How many problems does the 2018 GMC Terrain have?

The 2018 GMC Terrain currently has 199 owner-reported complaints according to NHTSA database. These complaints are organized by component to help identify common issues.

What are the most common problems with 2018 GMC Terrain?

The most common problems reported for the 2018 GMC Terrain are organized by component above. Each component section shows owner-reported issues, crash reports, and fire incidents to help identify patterns and problem areas.

Where does this 2018 GMC Terrain problem data come from?

All problem and complaint data for the 2018 GMC Terrain comes directly from the National Highway Traffic Safety Administration (NHTSA) database. These are real complaints submitted by actual vehicle owners.

2018 GMC Terrain Problems

SERVICE BRAKES

36 complaints

Difficulty with power assistive braking when traveling at low speeds

Jul 25, 2025

Brake booster went out and lost all braking ability on interstate doing 65 mph in spring of 2022 - had brake booster and exhaust cam replaced and April 20 2025 same break and same effect - no braking ability at interstate speed - extremely dangerous situation

Apr 21, 2025

I was slowing down to turn and I couldn't push my brake pedal down it completely locked up. If I wasn't already slowing down I would've hit a power pole and potentially lost my life. My ABS light never came on and it's still not on. After I got parked and shut my car off the check engine light came on.

Jan 23, 2025

Faulty Brake Vacuum Pump triggered my brake to get stuck while I was driving ended on the side of the express way to avoid traffic and prevent a crash.

Dec 31, 2024

I have a 2018 Terrain SLT. On 11/20/24, I was headed home from my commute to work driving my terrain with all the confidence in the world because I hadn't had any major issue with it. In 5pm stop and go traffic I decided on another route to my son's school to pick him up from practice. As the light at the end of the bridge turned red, I proceeded to stop, and my brake pedal was as stiff as stone. Going across that bridge I was literally standing up on the brake pedal with my back and shoulder against the roof of the truck for support trying to stop. As I came close to the cars that had already stopped I contemplated jumping out of the car but I decided to keep at it. It was God and God alone that cleared a shoulder for me to be able to pull over. I was petrified!! No signs, no brake noises, no hesitations, nothing! No warning lights on the dash, no alerts, NOTHING! Brakes were just gone! The mechanic said the vacuum pump had exploded and it was a known issue with terrains and that there was a bulletin regarding this. Pieces of the metal from the exploded vacuum pump were found inside of the engine. The mechanic was upset about the event and said to notify GM, something needed to be done about it. He gave me the vacuum pump to show the GM service center and he said one of the mechanics took pics of the metal in the engine. I called GM and was told to bring it in to a GM service shop so that they could check it out, but at my expense because the manufacturer warranty had expired. I AM SO UPSET WITH GM!! I have anxiety every time I go to press the brake! Panic attacks thinking about the possibility of this happening with my kids/elderly parents in tow. Thank God for covering me and all the drivers and their families that could have been hurt. Thank God my son/elderly parents weren't in the car! The fact that this is a known issue and it hasn't been addressed is heartbreaking. GM should do the right thing and recall these trucks, asap.

Dec 11, 2024

+ 31 more complaints for this component

UNKNOWN OR OTHER

17 complaints

I was 30 seconds away to pull in my driveway. WARNING came up on screen (service) TRANSMISSION UNABLE TO SHIFT. When I turned into my driveway the vehicle stopped suddenly & threw itself into PARK. Vehicle still running but would not go into any gear, drive or reverse. I then pushed the PARK button & I think it said EMERGENCY BRAKE RELEASED. I then proceeded to drive up my driveway with no problem. Haven’t gotten back in vehicle yet as I am afraid to but l made appointment to take it to the dealership to check it out. On 3/24. (Linus Cadillac Buick GMC)Thank god it happened in my driveway as it would’ve caused an accident. ( the vehicle was driven up the Rd. walking distance. Sat there for an hr. Visiting my family. Then was driving home When incident happened. So it wasn’t running hot or anything.

Mar 22, 2025

My car is allowing me to drive without the key fob. I've drove two hours away from my house where my key fob was. It allows me to shut off the vehicle. Vehicle says ' no remote detected. Press Brake to restart. This is the 3rd incident. This is definitely a safty issue. Someone can take my car 2 hours or so from my residence.

Jan 26, 2025

The clips popped off or something happened and now the headliner is hanging and I can't see out the rear view mirror. It's a hazard for anyone sitting in backseat. I've had it in 2 different shops .needs to be a recall because I've read several other people having this issue

Apr 14, 2024

This complaint is for the rear camera / back up camera system: After purchasing the vehicle the back up camera started to get hazy around 25,000 miles. At 35,000 miles it was completely useless. I purchased a second back up camera and had the body shop install it. It has now been right at the same mileage, 30,000 miles, and the camera is again hazy. This is not an external haze where I can just wipe the camera off, even carefully so as to not scratch the lens or cover, but a haze that is behind (inside) the protective outer lens (cap). This has happened with both cameras and I am facing installing a third. My vehicle has less than 70,000 miles on it! I've had other vehicles where the camera lasted way longer (lifetime!) of the vehicle. When I went to the dealer with the complaint on the original equipment they said it was because the lens was scratched, but didn't look any further that the lens was foggy 'inside'. The safety of myself and others comes into play when I cannot see what is behind me: trees, curbs, vehicles, people, drop-offs. Also, at night when in reverse the dash area the feed goes to is so bright that it blinds the driver and the system is unable to be dimmed to allow proper viewing.

Dec 30, 2023

I was driving my car December 10, 2023 when I was at a red light my truck completely shut down I could not reverse I could not put in drive I could not put in Park I could not switch gears. I didn’t know what happened. I had to call a tow truck to get me home once I got home I got my car towed to a shop. Before my car was towed I contacted OnStar. OnStar did a diagnosis on my car and it came back ECM which stands for electric control module. When my car was at the shop i got a tune up & the mechanic was able to start my car. Driving again on the date of December 15, 2023 it did it again and it said ECM. I was paranoid because I was on the expressway I had too get my car towed to the Dealership. This is the second time that my car has did this. I keep all maintenance up on my car. I’m not understanding what’s going on. I feel like it should be a recall on this issue. It was very dangerous both times that my car stopped. Now yet again I’m waiting to see what the problem is. This is definitely a safety recall issue. I have a 2018 Denali terrain with only 71,000 miles i keep up with oil changes and maintenance on my vehicle. Who do i contact about this concerning scary situation, Will it take for a person to die before this is is rectified. Someone please contact me or respond to this situation. So we can request for a recall on this serious matter

Dec 17, 2023

+ 12 more complaints for this component

ENGINE

15 complaints

Vacuum pump failure resulting in crankshaft sensor to completely sheer off.

Jan 03, 2026

Broken piston land and ring. car went into 'limp mode' while driving on interstate. Taken to dealer, told new engine was needed.

Jul 09, 2025

My vehicle’s engine was the component that failed. I was driving home from work. It is a forty-two minute commute. I was five minutes away from home when the vehicle slowed down in speed to a cruise. There were no issues prior after startup. There were no strange sounds, no start up issues, and no lights on the dashboard at all. I noticed that the vehicle had put itself into neutral gear. When I tried to stop the vehicle by hitting the break, the break did not work. I put my foot on the gas pedal and the car did not speed up. I could not change the gears. There was nothing I could do. The vehicle came to a complete stop when it powered off. When the car was put into accessory mode, there was an error message that stated the engine/vehicle was in low power mode. I was not able to start the car’s engine again. It was useless. The only way to move the car anywhere was to have it towed. This failure was scary and dangerous because it occurred in the middle of the night on a main road. Cars are known to drive above the speed limit past midnight in this area. I was glad that there were no cars on the road at the time. I was not aware of this failure occurring for my vehicle no were there any other known recalls. After doing some personal research, I found that GMC and certain Chevy models are having this problem, but no source listed any GMC Terrains as affected vehicles; although the same thing that happened to other people happened to me. I purchased an extended warranty through Fidelity Warranty Services, Inc. (Platinum) when I purchased the vehicle. They were the ones that had done all the necessary inspections for the filed claim once the vehicle was taken to a GMC Service center: Anderson Buick in Cockeysville, MD.

Apr 17, 2025

The contact owns a 2018 GMC Terrain. The contact stated that while driving at an undisclosed speed, the vehicle stalled. There was no warning light illuminated. The vehicle was restarted; however, the failure recurred. The vehicle was taken to an independent mechanic where it was diagnosed that the vacuum pump had failed and needed to be replaced. The vehicle was not repaired. The vehicle was taken to the dealer where it was diagnosed that the vacuum pump had failed and needed to be replaced. The vehicle was repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 121,000.

Oct 09, 2024

The contact owns a 2018 GMC Terrain. The contact stated that while her husband was driving 30 MPH, the message "Engine Power Reduced" was displayed and the vehicle stalled. The vehicle was not able to be restarted. The contact stated that the vehicle was coasted off to the side of road. The vehicle was towed to the residence and then to a dealer where it was diagnosed and determined that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 92,000.

Oct 01, 2024

+ 10 more complaints for this component

POWER TRAIN

15 complaints

The contact owns a 2018 GMC Terrain. The contact stated that while driving at an undisclosed speed, the unintendedly decelerated and failed to properly accelerate. The vehicle was taken to the local dealer, who diagnosed the vehicle with transmission failure. The contact was informed that the transmission needed to be replaced. The transmission was replaced with a used transmission, but the failure reoccurred. The vehicle was taken back to the local dealer who diagnosed and determined that the replacement transmission had failed and needed to be replaced. The vehicle was not yet repaired. The manufacturer was not notified of the failure. The failure mileage was 53,000. The VIN was not available.

Oct 08, 2025

I bought this car used and had only had it about a month when I was driving to work and was in slow traffic on the freeway when my car slowed to a stop despite the fact that I had my foot on the gas pedal. It turns out it was a transmission failure. My safety and the safety of the drivers around me were put at risk because I was unable to move my car over to the shoulder and out of the lane of traffic. Traffic was slow but was still moving. My vehicle is available for inspection but I’ve already had it repaired so I no longer have the faulty transmission. The problem was confirmed by an independent service center where I had it repaired. The vehicle was inspected by the dealer and the independent service center. The dealer had it for 12 days but was unable to diagnose it so I took it to an independent service center. It was also briefly looked at and listened to by the highway patrol officer who assisted me and he also thought that the transmission had failed. The check engine light was on when this incident occurred but I was having an issue with one of the glow plugs and I thought that that was the reason. The check engine light came on the night before the transmission failed.

Aug 07, 2025

My vehicle put itself in park in the middle of an intersection while waiting to make a left turn in the middle of rush hour traffic. The car could not even be placed in neutral to be pushed out of the way of oncoming traffic. Narrowly avoided a collision.

Sep 15, 2023

Transmission failed. Unable to purchase a replacement as there are no available transmissions for this year terrian.

Jul 17, 2023

While driving in the rain at about 25-30 mph I noticed a loss of propulsion and before I could turn off the main road the vehicle came to a rolling stop and would not recognize any gears. causing us to block the roadway and had to have it towed home. Took to local car dealer they said it RDCCM abnormal errors like u0422-00 and brake control module errors. Further diagnostics were need to figure out the cause and it possible that the Transmision is having problems now! This should be recalled.

Dec 13, 2022

+ 10 more complaints for this component

ELECTRICAL SYSTEM

13 complaints

The infotainment system will just randomly start going haywire and when it happens, you cannot use the touchscreen. It will try to randomly delete app icons such as the camera, it will try to delete connected phones, it will try to delete radio favorites and it will move app icons all around. These are just a few examples of things that happen.

Dec 11, 2025

The contact owns a 2018 GMC Terrain. The contact stated that on several occasions while driving at various speeds, the infotainment system screen and radio inadvertently switched stations from AM to FM. On other occasions, while driving and using the GPS system, the screen went blank. The contact stated that on several occasions the screen was turned off, and on other occasions, the screen was turned off and on however, the failure was temporally fixed. The vehicle was not diagnosed of repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 77,000.

Aug 28, 2025

The contact owns a 2018 GMC Terrain. The contact stated while driving at an undisclosed speed, the contact became aware that the horn was inoperable. There was no warning light illuminated. The vehicle was taken to the dealer. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was not available.

Aug 27, 2024

The door locks began to have issues; the locks started to work only occassionally for no apparent reason. I've been locked out of the car several times and had to use the auxiliary key. Plus I couldn't lock the car while I was inside as the interior door lock button wouldn't lock or unlock the doors either. It's not a kefob or battery issue and no lights on the dashboard. The dealer reports that they couldn't reproduce the issue. However they found corrision on the electrical harness inside the passenger front door. I replaced an electrical harness in the rear bumper 18 months prior for corrision found. The dealer says they received a service bulletin on the "electrical harness" issue however the dealer won't cover the cost of $500 to replace the harness. As this deals with the electrical system, my concern is that it may effect the operation of other components of the car while it's running. Safety and security is of the utmost importance whether at home or away as it regards to being able to lock or unlock the doors.

Jan 07, 2024

On Wed., Dec. 6 around 3:15 pm during heavy traffic on FWY [XXX], cars slowed down to a brief complete stop. When I went to start slowly as traffic began to move, engine completely shut down. I could not open windows or my door to get out of vehicle. Immediately called 911 and was transferred to DPS. It took approximately 65 minutes before I had help and was finally towed from the dangerous freeway lane where I was stuck and with vehicle completely stalled and locked down, I couldn't even get car in N to be able to have help moving to a non dangerous place outside of the FWY lanes. This is the fifth time this car locks down. I've learned to open a panel by the foot brake area, pull a lever in that area and be able to move the car to a safe location until I got towed into the dealer. It is the second time that this has happened in a potentially dangerous street and now Freeway. Danger to myself and many others that had to maneuver around me. The first time (around 2020) the car totally shut down, it was reported that a computer harness had to be replaced. This last time I was faced with such a dangerous situation on a FWY it was determined that the ECM (Engine Control Module) had caused the shutdown and locked the vehicle to where I could not even get out for close to an hour. The ECM was replaced by GM and the car is running again, but my shock and trauma still haunt me as to the self and others danger that was present. . GMC Dealer finally determined after several attempts that ECM was the problem. Unsure if available to inspect it. Delivered car back 12/8. . Heavy freeway traffic at peak hour put me and many others in serious danger. . My dealer report reads it was difficult to diagnose and finally find ECM was the problem. .Vehicle has not been inspected by Manufacturer, police, or insurance. .A few minutes before this lock-down an engine icon appeared while on the FWY. Previous shutdown incidents had no warnings or messages before locking up. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Dec 12, 2023

+ 8 more complaints for this component

SERVICE BRAKES,ENGINE

10 complaints

My car started experiencing a strange problem while braking on June 15. I released the parking brake leaving my parents driveway. I coasted backwards (as usual), and when I pressed the brake the car didn't stop as expected and the brake pedal was very hard to press. It eventually stopped. I put into park, then put the emergency brake on, then released all and tried again and encountered the same issue, that it was very very slow to stop and the brake pedal was hard to push in. I got home, parked the car - tested the reverse brake on flat surface and didn't notice the issue. The next day, the problem started happening with the front brake as well and an error code popped up that said 'check brake assist' which I've never seen before. I brought it to my local mechanic, who took a look and said that it's a vacuum pump failure, and the result is a lot of metal shards were released into the engine when the vacuum pump failed. My mechanic recommended I take to a GMC dealer for further evaluation. I looked up the recall on this issue, and see that it impacts a lot cars, including the 2017 GMC terrain, but not my 2018 GMC terrain. I am going to take it to the GMC dealer but I'm afraid I won't be able to afford the repair, and it doesn't seem like there was anything I could have done to prevent this from happening.

Jun 17, 2025

Brake vacuum pump failed causing engine damage. Camshaft on national back order. Vehicle has been in repair shop for 1.5 months waiting on part. No ETA. There has been recall for similar vehicles with same issue, failure, damage. But not for this VIN. It’s the same failure with same damage. How is this not a recall for this VIN?

Feb 18, 2025

I got my car out of the shop a week ago for my brakes the car was in the shop for a month and this past weekend my car is doing the same exact thing a week later I was on I 75 also hit a semi truck

Dec 30, 2024

While driving the vehicle the vacuum pump failed and caused the camshaft to seize and physically break which caused the break peddle to become hard and breaking the vehicle was limited and almost nonexistent, which caused an extremely dangerous situation on the highway.

Oct 04, 2024

In 2022 and now in sept of 2024 my entire braking system has failed. Cause you a complete in abilty to stop the vehicle. Upon this failure without any warning peice of the braking system connected to the engine shoots shrapnel into my engine and causes the cam to be destroyed. Now I can't get my car back because of a shortage on this part.

Sep 26, 2024

+ 5 more complaints for this component

AIR BAGS

8 complaints

My car said to me this not that there is something wrong with the Service Safety Restraint system! It was fine last night when I got home! I just bought this car a month ago and everything was fine and now my air bag light is on and will not go off!

Oct 29, 2025

Head on collision with a deer destroying the front head light and severely damaging the drivers side door. No airbags were deployed.

Dec 27, 2023

Crash: 1

The contact owns a 2018 GMC Terrain. The contact stated that the air bag warning light was illuminated. Additionally, the service restraint system message was displayed on the instrument panel. The vehicle was taken to the dealer to be diagnosed. The contact stated that the driver’s side front impact sensor had failed and needed to be replaced. The vehicle had not been repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 55,705. The contact stated that the dealership suggested that the issue be addressed right away since it involves the airbags.

Apr 11, 2023

The Safety Restraint System warning keeps coming on and off as well as the air bag light. It happened months ago so I took it in and got it looked at and scanned. All the seatbelts were checked and the scan came back with nothing. Then it stopped for a couple months and now it has started again. Ive had 14 surgeries in the last little less than 4 years and I'm about to go into my 3rd back surgery since November. I cannot get into an accident and not have airbags as I've also had brain surgery 3 winters ago as well. I am disabled and do not have a ton of money either for fixes that aren't necessary but this safety issue is crucial to me. I see that many 2018s have been recalled for the exact same issue that I'm having however mine doesn't come up with that but it is happening to me so that should be included. I also need some direction if not as to why this is happening because I cannot afford to have a dealership, no less, replace every tiny little thing looking for the culprit at $150 an hour when I live on $1,200 a month and most goes to medical. Please advise on what to to or where to start. Thank you.

Aug 18, 2022

Started car in parking lot. Warning came on saying “service safety restraint system” and airbag illumination was on. Just notified salesman as I have only had this vehicle about 10 days. Bought it used. Unfortunately.

May 09, 2022

+ 3 more complaints for this component

SERVICE BRAKES, HYDRAULIC

6 complaints

The contact owns a 2018 GMC Terrain. The contact stated that while driving approximately 30 MPH, the brake pedal became extremely difficult to depress, with the message "Brake Assist" displayed. The vehicle was driven to the shoulder of the roadway and the parking brake was activated, and the vehicle was turned off. The contact stated that the transmission failed to shift into gear, and the vehicle was dragged onto a flatbed truck and towed to the residence. The cause of the failure was not yet determined. The local dealer and manufacturer were notified of the failure, but no assistance was offered. The failure mileage was 132,386.

Dec 08, 2025

The contact owns a 2018 GMC Terrain. The contact stated that while driving at an undisclosed speed, the vehicle shuddered and failed to come to a stop while the brake pedal was depressed. The check engine warning light was illuminated. The vehicle was taken to a local independent mechanic, where it was diagnosed with a locked brake vacuum pump. The contact was informed that parts of the brake vacuum pump had entered inside the camshaft and valve cover. Several unknown local dealers were contacted. The vehicle was not diagnosed or repaired because there was no recall associated with the VIN. The manufacturer was made aware of the failure. The failure mileage was approximately 183,000.

Nov 21, 2025

The contact owns a 2018 GMC Terrain. The contact stated while driving at various speeds, the vehicle would not decelerate as intended while depressing the brake pedal. No warning light was illuminated. The vehicle was previously repaired at a local independent mechanic and the vacuum pump was replaced; however, approximately 32 days later the failure reoccurred. The local dealer was not contacted. The manufacturer was not made aware of the failure. The failure mileage was approximately 58,000.

Feb 03, 2025

The contact owns a 2018 GMC Terrain. The contact stated while driving approximately 70 MPH, the brakes inadvertently activated. There was no warning light illuminated. The vehicle was not drivable and was towed to the residence. The vehicle was then towed to an independent mechanic to be diagnosed. The contact was informed that the vacuum pump needed to be replaced. The vehicle was repaired; however, the failure persisted. The contact had the vehicle repaired several times; however, the failure persisted. The contact was also informed that the rotors needed to be replaced after the vehicle had been repaired several more times. The manufacturer was not notified of the failure. The failure mileage was unknown.

Jul 30, 2024

The contact owns a 2018 GMC Terrain. The contact stated that while driving at 35 MPH, the brake pedal was firm and became inoperable. No warning light was illuminated. The vehicle was towed to a dealer to be diagnosed. The contact was informed that the failure was due to a faulty vacuum pump. The vehicle had not been repaired. The manufacturer was made aware of the failure and advised the contact to call NHTSA Hotline for assistance. The failure mileage was approximately 66,084.

Oct 16, 2023

+ 1 more complaint for this component

POWER TRAIN,VEHICLE SPEED CONTROL,ENGINE

4 complaints

When driving the car at low speeds, or right after having been stopped for a few moments. Upon, acceleration, the car will sometimes go into a limp mode. On the DIC, will be displayed a warning about how the car will have the speed reduced after 175 miles and to check the emissions system. The speed has already been reduced at that point. Also displayed maybe a warning about how the power has been reduced. USUALLY, if I turn off the car and wait about a minute, I can restart the car and drive at a normal highway speed again. But not always. The warning on the DIC, will usually turn off if the car does return to normal speeds after about 5 - 10 miles. However, the check engine light may still stay on for several days. This problem can be a daily occurrence. I've had the car in the shop several times, and they have been unable to fix the problem. The car can be unpredictably unsafe, when speed is instantly reduced to 30 mph!

Oct 03, 2022

I have a 2018 GMC TERRAIN which I bought brand new from General Motors. In May 2022, the vehicle started jerking/hoping and trying to stall when the speed gets to 55 miles per hour or higher. I have taken it to the dealership on three different occasions for repair and I still have this issue. General Motors engineers were involved in every step of the repairs. They just do not know what is going on with the car or fix it and they are too stubborn. The dealership told me today that they cannot do anything else to the car. They also said they had a code from the engine last week and General Motors said they do not know what that code means. They are forcing me to accept/drive the car in this unsafe condition. I have contacted them multiple times and they do not care.

Jul 18, 2022

WAS LEAVING A PARKING SPOT. VEHICLE REVERSED FINE, PUT IT IN DRIVE AND IT BEGAN TO JERK AND DID NOT ACCELERATE PROPERLY. MADE IT TO THE NEXT AISLE TO PARK IT AND GET OUT OF WAY. ONCE PARKED, SHUT OFF VEHICLE. STARTED IT. REVERSED IT AND IT WOULD ONLY REV UP, DID NOT REVERSE. PUT IT IN DRIVE AND IT JERKED FORWARD, HARD AND KEPT JERKING AS I PULLED FORWARD. PARKED IT AGAIN AND TURNED IT OFF. CALLED DEALERSHIP, WHO CALLED A TOW SERVICE TO TOW IT TO THEM. ATTEMPTED TO SHOW TOW GUY THE ISSUE AT HIS REQUEST, UPON HIS ARRIVAL, PUT IT IN REVERSE AND IT REVVED UP BRIEFLY THEN JERKED INTO REVERSE. HAD TO MOVE VEHICLE TO CLEAR AREA TO GET IT ON THE TOW TRUCK SO I PUT IT IN DRIVE AND IT BEGAN TO JERK CONSTANTLY AND BARELY ACCELERATING AS I DROVE AND FELT AND SOUNDED LIKE IT WAS GOING TO SHUT OFF (BUT DIDN'T) BEFORE I MADE IT TO WHERE I COULD PARK AGAIN. LUCKILY I WAS IN A PARKING LOT AND NOT ON THE ROAD. I'VE HAD THIS VEHICLE EXACTLY A MONTH. VERY SCARY.

Jul 04, 2019

MY VEHICLE IS STALLING AND STUTTERING WHILE TRYING TO ACCELERATE. IT ALSO DOES THE SAME WHEN DECELERATING. THE TRUCK WILL JERK AND STUTTER. ALSO MAKING NOISE LIKE A VACUUM CLEANER WHILE THIS IS GOING ON. I JUST PURCHASED THIS VEHICLE IN SEPTEMBER 2018 AND IT HAS BEEN GOING ON SINCE NOVEMBER 2018

Jan 14, 2019

ELECTRICAL SYSTEM,UNKNOWN OR OTHER,SERVICE BRAKES

3 complaints

Component Affected: Service Brakes, Hydraulic – Brake Vacuum Pump Summary of the Problem: I am reporting a serious safety issue involving the brake vacuum pump on my 2018 GMC Terrain. The brake pump failed catastrophically ("blew up"), resulting in a sudden loss of braking power. This occurred without warning and posed a significant risk to my safety and others on the road. We were traveling to vacation in Florida and thankfully had just gotten off the interstate. Details: The failure caused the brake pedal to become extremely hard to press, and the vehicle required a much longer distance to stop. We experienced no brake at the brake booster and a blown vacuum pump is due to a faulty vacuum pump which is a known issue for this model. Fortunately, no accident occurred, but the situation could have easily led to a collision. A certified mechanic confirmed that the brake vacuum pump exploded and needs to be replaced. I have incurred significant out-of-pocket repair costs due to this issue. We had to uber to our vacation room, get Walmart Plus to have groceries delivered to our room. We had to have Uber Eats deliver other supplies. We have had to walk to various places for dinner and entertainment because Avis and Budget had no vehicles available to rent and Enterprise was closed as we arrived on Saturday afternoon. I have checked for recalls and service bulletins using my VIN, but none are currently listed for this specific issue, despite similar problems being reported in other GM vehicles. Request: I urge the NHTSA to investigate this issue further. The failure of a critical braking component without warning is a serious safety concern. I believe this may be part of a broader pattern of brake system failures in GM vehicles and should be addressed through a recall or safety campaign. Also, the estimate for the repair is $2,500 so any reimbursement would be greatly appreciated. We just received this estimate but I can provide it at a later date.

Jul 14, 2025

Safety was put at risk when brakes went out without warning, and unable to use emergency brake at that time. Car was serviced for over $1700, with the mechanics stating that the piece “blew up.”

May 13, 2024

I HAVE AROUND 6 TO 7 MONTH WITH THE VEHICLE AND SINCE DAY ONE IT MADE A WEARD NOISE IN THE ENGINE TRANSMISSION AREA AND THE VEHICLE DOESNT RESPOND AND PERFORM WELL I TOOK IT TO THE DEALERSHIP AND AT FIRST THEY STATED IT WAS SOMETHING WITH THE TRANSMISSION AND THEN THEY STARTED GIVING ME MANYDIFERENT EXCUSES AND THAT IT WAS NORMAL BUT STILL THE SUV WOULDNT RESPOND I CALLED GM AND THEY OPENED A TICKET BUT AFTER THAT THEY SAID THEY COULD NOT DO ANYTHING ABOUT IT IN OTHER WORDS THEY TOLD ME I HAD TO DEAL WITH THE ISSUE. YESTURDAY FEB 26,2019 THE SUV STARTED HAVING WORST PROBLEMS AS TO WHERE IT WOULD NOT RUN MOR THEN 33 MILES A HOUR IT STARTED SHAKING RPMS GOING WILD THE VEHICLE ONLY HAS 5500 MILES ON IT. I DONT KNOW WHAT TO DO OUT OF THIS TIME I HAVE WITH IT THE VEHICLE HAS BEEN MORE TIMED AT THE DEALERSHIP THAN WITH ME

Feb 27, 2019

UNKNOWN OR OTHER,ENGINE

3 complaints

The car very suddenly went into a reduced engine power mode, with check engine light and was immediately parked. Figuring I could turn the car off and turn it back on, however it sputtered turning off and shook violently before I was able to turn it off. It would then not turn back over, so I left it off and had a tow truck drive it to a GMC mechanic. The GMC mechanic was unable to diagnose an issue after days. I then had it towed to another local mechanic who stated the parts were "junk" and the engine needed to be replaced. Engine codes were related to the camshaft sensor and brake booster. It is my understanding the vacuum pump broke off into pieces, went into and destroyed my engine.

Jun 14, 2024

THE NEW AUTO STOP THAT SHUTS OFF THE MOTOR WHEN YOU'RE AT A RED LIGHT DOESN'T WORK PROPERLY. SOMETIMES IT SHUTS OFF, BUT MOST OF THE TIME IT DOESN'T BEEN TO THE DEALER TWO TIMES AND THE RADIO WILL NOT COME ON AT TIMES EVEN THOUGH GM HAS PERFORMED UPDATES ON THESE PROBLEMS. THE PROBLEMS STILL EXIST

Dec 05, 2019

PURCHASED A BRAND NEW GMC TERRAIN. 12 DAYS AND 460 MILES LATER THE SERVICE ENGINE SOON LIGHT CAME ON. TOOK IT TO DEALERSHIP FOR A P050F. THIS IS CODE FOR A LEAK IN THE BOOSTER. THEY DID NOT REPAIR ANYTHING, JUST CHECKED FOR LEAK AND RESET ENGINE LIGHT. AS I READ MORE, THE PROBLEM AFFECTS THE BRAKES ABILITY TO FUNCTION PROPERLY INCREASING DANGER TO DRIVER. THERE IS ALSO DEFECTIVE STOP/IDLE ON THE ENGINE THAT NO LONGER WORKS. I WAS JUST DRIVING DOWN THE ROAD IN TOWN WHEN IT POPPED ON. GM AND YOUNG'S HAVE REFUSED TO REFUND THIS DEFECTIVE VEHICLE.

Apr 16, 2018

FUEL/PROPULSION SYSTEM

3 complaints

Yesterday morning I noticed a smell of gas around my car. I looked and didn’t see anything. I drove to work. Once I got back to my vehicle after work I could smell gas as I approached my vehicle. I looked under my car and noticed a puddle of gas. I went to the gas station to put enough fuel for me to make it home in my vehicle and as I was putting the gas I noticed a drip under the vehicle. Once I got home and parked my vehicle I looked under the car and there was a rapid and steady drip coming from the fuel tank. The same make, mode and year of my vehicle has been recalled for this.

Oct 08, 2021

LEAKING DIESEL FUEL LINE WHILE RUNNING, PARKED AND IN GEAR. SECOND DIESEL TERRAIN FLEET VEHICLE TO LEAK FUEL; OTHER COLLEAGUE HAD THE SAME ISSUE RECENTLY AND WAS ASKED IF SOMEONE CUT THE FUEL LINE. NOW, MINE IS LEAKING.

Nov 18, 2018

THIS CAR, A 2018 GMC TERRAIN IS EQUIPPED WITH AUTO START / STOP, A STANDARD FEATURE THAT TURNS OFF THE ENGINE WHEN BRAKE IS APPLIED, SUCH AS AT A STOP LIGHT. THE ENGINE TURNS OFF WHILE BRIEFLY STOPPED AT A STOP SIGN. THIS IS DANGEROUS AND A SAFETY ISSUE. WHILE ATTEMPTING TO PULL INTO A TRAFFIC LANE WITH THE ENGINE OFF, I HAVE EXPERIENCED AN UNSAFE LAG BEFORE THE ENGINE RESTARTS. GM HAS STATED, THE ENGINE CAN BE TURNED BACK ON BY REMOVING YOUR FOOT BRIEFLY FROM THE BRAKE PEDAL. SERIOUSLY ??? WHILE BEHIND ANOTHER VEHICLE, I WILL NOT FOLLOW THIS PROCEDURE. I HAVE NO CONFIDENCE THE ENGINE WILL RESTART AND LUNGE FORWARD, STRIKING THE VEHICLE AHEAD. I WANT GM TO PROVIDE THE CAPABILITY TO PROVIDE THE DRIVER THE ABILITY TO ENABLE OR DISABLE AUTO START / STOP. THE FEATURE IS ALSO TOUTED AS SAVING FUEL WHILE STOPPED. PERHAPS A TINY AMOUNT WHILE AT A LONG LIGHT OR TRAIN CROSSING. CERTAINLY NOT AT A STOP SIGN OR STOPPED BEHIND ANOTHER VEHICLE.

Jan 11, 2018

POWER TRAIN,ELECTRICAL SYSTEM,ELECTRONIC STABILITY CONTROL (ESC)

3 complaints

VEHICLE WAS IN SERVICE FOR 9 DAYS FOR- (AS IDENTIFIED ON THE INFORMATION SYSTEM) TRANSMISSION, STABILITRAK, PARKING ASSIST AND A MESSAGE "THE VEHICLE WAS UNSAFE TO DRIVE". ON FRIDAY, MAY 12, 2018 I PICKED UP VEHICLE FROM JIM CAUSLEY AFTER REPAIR AND REPLACEMENT AS INDICATED ON THE SERVICE REPORT. I DROVE NO MORE THAT 15 MILES AND THE VEHICLE JERKED, STALLED, MADE LOUD NOISES AND SMELLED OF SOMETHING BURNING. THE VEHICLE WENT FROM 35MPH TO 5MPH. THE VEHICLE WOULD NOT ACCELERATE BEYOND 10-15MPH. I HAD TO HAVE THE VEHICLE TOWED TO MY RESIDENCE. ON TUESDAY, MAY 15, 2018 I HAD IT TOWED TO JIM CAUSLEY. THIS IS A CONTINUATION OF THE FIRST COMPLAINT #11091743.

May 16, 2018

ADDITION TO REPORT 11091743. THE VEHICLE WAS SERVICED FOR WARNING OF TRANSMISSION, STABILITRAK, PARKING ASSIST AND NOTIFICATION THAT VEHICLE WAS UNSAFE TO DRIVE (MAY 2, 2018). VEHICLE PICKED UP (MAY 11, 2018) AFTER SERIES OF REPAIRS. I DROVE APPROXIMATELY 15 MILES AND THE VEHICLE BEGAN JERKING AND STALLING. AT THE FINAL JERK THE VEHICLE WENT FROM 35 MPH TO 5MPH AND WOULD NOT ACCELLERATE. THERE WERE SEVERAL LOUD NOISES AND A BURNING SMELL. THE VEHICLE HAD TO BE TOWED TO MY RESIDENCE. WHEN I PICKED UP THE VEHICLE FROM JIM CAUSLEY I ASKED IF IT WAS SAFE TO DRIVE. I RECEIVED NO RESPONSE. I ASKED ABOUT THE REPAIRS AND I WAS TOLD THERE WERE SOME LOOSE WIRES AND MINOR ADJUSTMENTS. ONCE AGAIN MY LIFE WAS PUT IN JEOPARDY BECAUSE OF A VEHICLE FAILING TO OPERATE WHILE IN HEAVY TRAFFIC.

May 12, 2018

STOPPED AT A LIGHT TO MAKE A LEFT TURN. THE VEHICLE JERKED, THEN SHIFTED FROM DRIVE TO PARK. THE INFO SYSTEM GAVE ME THE FOLLOWING MESSAGES: TRANSMISSION, STABILITRAK AND PARKING ASSIST. I TURNED THE VEHICLE OFF AND TRIED TO RESTART IT. I GOT A MESSAGE THAT SAID "THIS VEHICLE IS UNSAFE TO DRIVE.:" AT THIS TIME NON OF THE GEAR OPTIONS WERE AVAILABLE. A ROSEVILLE, MICHIGAN POLICE OFFICER HAD TO POSITION HERSELF BEHIND ME BECSUSE CARS WERE GOING AROUND ME ON BOTH SIDES (MY FOUR WAY BLINKERS WERE ON).THE TOW TRUCK DRIVER WAS UNABLE TO PUT THE VEHICLE IN NEUTRAL, THUS MY VEHICLE HAD TO BE DRAGGED ONTO THE TRUCK. AT THE DEALER THEY WERE UNABLE TO CHANGE GEARS AND ONCE AGAIN MY VEHICLE WAS DRAGGED OFF THE TOW TRUCK PRIOR TO THIS INCIDENT. I REPORTED TO THE DEALER THE ROCKY, BOUNCY, PULLING RIDE WHICH MADE THE VEHICLE HARD TO CONTROL. I ALSO REPORTED THE JERKING WHILE DRIVING AND IN THE AUTO STOP. DESPITE ALL OF MY VERBALIZATIONS OF THE CONCERNS, THEY, WROTE THE WORK ORDERS IN DEALER LANGUAGE AND ONLY ADDRESSED WHAT THEY WANTED.

May 04, 2018

POWER TRAIN,SERVICE BRAKES,ENGINE

2 complaints

April 2025, Vacuum Pump went out meaning lost breaks going 60 miles per hour down the road after engine light came on. Left me and two children stranded 2 hours from home with no way to get back except a tow. Now September 2025 Cam Shafts are out as well as Vacuum Pump. Stranded boyfriend and I two hours away again. Now metal in oil and warranty is not willing to cover it due to the vacuum pump going out. Made a post on Facebook and got lots of feedback on how their newer terrains have done the same things. Work in insurance and have people car pertaining to their terrains wondering if we cover engine replacements. There is major issues with these vehicle. Mine only has 107,000 miles on it and I have 12,000 left to pay. The motor is shot and dealership wants to “flush” the metal out of the engine. Very frustrated, I put 12,000 out of my college fund to have a reliable vehicle for my two kids and now this is all I have. A car that doesn’t run. I called warranty and the man I talked to even said that they get a lot of calls for these cars needing to be fixed. I am at a loss on what to do now. The below information about the incident is for the most recent one happening in September. I know that this sounds like a warranty and dealership issue but I guaranty if you send something out to terrain owners they will report major issues that they have had. Leaving them stuck in loans and no where to go.

Oct 03, 2025

The vacuum pump started leaking and the car was parked immediately. When The pump was pulled out to be replaced, the reason for the leak was identified. The vacuum pump had busted into small pieces which are now in the engine.

Jul 19, 2023

AIR BAGS,SEAT BELTS

2 complaints

The contact owned a 2018 GMC Terrain. The contact stated that while driving and nearly coming to a complete stop in the right lane, another vehicle driving approximately 40-50 MPH crashed into the rear of the vehicle, causing the contact to hit her face against the steering wheel, and the contact became unconscious temporarily. The contact stated that upon regaining consciousness, the contact noticed that the vehicle had moved to the grass by the left lane of the road, where traffic was going in the opposite direction. It was unknown whether the vehicle was involved in a second collision. A message advising that an accident was detected and inquiring whether 911 should be contacted was displayed. The contact stated that the air bags failed to deploy, and the front driver's side seat belt failed to retract as needed. A bystander opened the driver's side door to verify that the contact was safe. The contact noticed that she was bleeding significantly and was unable to move the right shoulder and the neck. The emergency units assisted the contact out of the vehicle. The emergency units placed braces on the contact's neck and placed the contact on a stretcher. The contact was transported to the hospital, where the contact underwent X-rays and CT scans. The contact was informed that she had sustained a concussion, lumbar injuries, a fractured nose, loss of taste and smell, laceration on the inner and outer side of the bottom lip, carpal tunnel on the right hand, severe whiplash, laceration on the right shoulder, and a cut behind the right ear. The contact was in the process of undergoing MRIs. A police report was filed. The vehicle was towed and totaled, but was still under investigation. The dealer was not notified of the failure. The manufacturer was notified of the failure, and a case was filed; however, no further assistance was provided. The failure mileage was unknown.

May 23, 2025

Crash: 1

Injuries: 1

The "Service Safety Restraint System" warning light appears on the dashboard and warning chimes continually sound. To my knowledge GMC had a recall for this in 2018. I purchased the vehicle in 2021. I contacted GMC and told them this issue and they informed me that there are no recalls on the vehicle. My concerns being that airbags are fully functional.

Oct 02, 2024

POWER TRAIN,ENGINE

2 complaints

Timing chain. It had no warning and failed due to poor design and gm in Europe fixed/addressed the issue by installing a plate behind the tensioner a part that isn’t available in the us.

May 05, 2025

While driving the vehicle which only has 68,000 miles the reduced engine power warning light appeared. As quickly as was safe the car was pulled to the shoulder. It was towed to the dealer who states the Vacuum pump seized causing the camshaft phase actuator locating pin to spin. Originally they stated a new camshaft and vacuum pump were needed at $3,500, but now state the entire engine is damaged and must be replaced at cost of $12,000. The vehicle was well serviced and this manufacturing flaw lead to the vehicle be stopped on the road putting both the occupants and others around at risk.

Mar 29, 2024

SERVICE BRAKES,FORWARD COLLISION AVOIDANCE

2 complaints

On 9/3/23 I was travelling down interstate 94 in Illinois when all of a sudden my check engine light came on. Not knowing what the issue was, but knowing that the car still seemed to be OK and I was only a few miles from home I decided to drive home and figure out the issue from there. At this point I had no idea that the brakes had completely locked up. Once I realized what was happening I did my best to slow the vehicle down by decelerating, frantically pumping on the locked up brakes, and then finally slowing enough to take an exit and roll in to a gas station. Frankly, it was the most terrifying moment of my life travelling 70 MPH without the ability to stop. Upon inspection, the independent service tech informed us that the vacuum pump had exploded (yes, exploded) and that he had never seen anything like it, especially in a car with less than 70,000 miles. What component or system failed or malfunctioned, and is it available for inspection upon request? The vacuum pump failed and unfortunately it completely exploded so there were only a few pieces left inside of the engine. How was your safety or the safety of others put at risk? My brakes locked up completely on the interstate, with my family in the car, and I was unable to stop. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes. The independent service center where I currently have the vehicle has confirmed, and spoken with GM. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? No, GMC refuses to do anything about it even though there is a prior recall for the same part on other GMC vehicles during the same time frame. I'm told it's the exact same part. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? Yes, roughly 1 minute prior to the breaks locking up the "check engine" light came on.

Sep 06, 2023

Vehicle stuck in emergency assist mood. Without warning I couldn't slow down/stop without putting alot of my weight on the brake breaks were so hard to press down.

Sep 12, 2022

ELECTRICAL SYSTEM,FUEL/PROPULSION SYSTEM

2 complaints

1. 2018 Terrain would not start in a parking lot. Remote was used after several attempts to start with push button failed, and after a slight hesitation , engine started. Vehicle was driven about 6 miles without incident. 2. Vehicle was driven about 10 miles the next day and start/stop engaged at a stop light but would not restart. After about 3 minutes of cycling throught the starting procedure, the vehicle started. Drove another 8 miles without incident. 3. Next morning, drove about 3 miles to intersection where start/stop engaged but would not restart. After about 30 minutes of cycling through starting procedure and an attempt to jump start was made the vehicle restarted. At this point, the vehicle was taken to Romain GMC for service. A new battery was installed and other related operations.After about 10-15 miles, the vehicle would not start. Remote was attempted but it would not start. After about an hour, vehicle started and was driven back to Romain avoiding the stop/ start engagement.

Apr 11, 2022

SCREEN WENT BLACK AND WARNING CHIMES AND SEAT VIBRATION DID NOT GO OFF WHEN BACKING UP. HAD TO FILE A CLAIM WITH INSURANCE TO FIX MY DENTED BUMPER. I ALSO EXPERIENCE ISSUES WITH THE AUDIO BUTTONS ON THE STEERING WHEEL. I AM NOT ABLE TO CHANGE THE SONG IN I AM ON APPLE PLAY AND THERE IS ALWAYS A DELAY WHEN CHANGING RADIO STATIONS.

Oct 22, 2019

Crash: 1

STEERING

2 complaints

Car gives a "Power Steering Reduced, Drive With Care" message after turning the wheel one direction and braking simultaneously. After message is displayed, power steering is no longer available, and this can happen while driving around a curve. Once car is powered off for longer than 1 minute, can turn back on with no problem, but problem can come back just the same. Took to GMC dealer. They recalibrated my car, but problem came back 1 month later. They said they can replace the whole electric steering system, but that may not fix the problem, as they do not know what the real problem is. Vehicle was purchased used with 50K miles.

Oct 28, 2021

WHEN I AM DRIVING THE POWER STEERING DOESNT WORK WELL AND THE STEERING IS HARD TO TURN AND KEEP VEHICLE IN ITS LANE IT ALSO DOES NOT COME BACK TO THE STRAIT POSITION OR CENTER IF ITS TURNING LEFT YOU HAVE TO BRING IT STRAIGHT AND IT IS HARD TO TURN SO IT GOES BACK AND FORTH ROUGHLY I FEEL IT LOOKSLIKE I AM DRUNK DRIVING OR SOMETHING IS WRONG WITH THE OPERATOR BUT ITS IN THE STEERING MAYBE THE SPEED SENSING PART OR SOMETHING BUT THE SERVICE CENTER AT THE DEALERSHIP SAYS IT DRIVES THE WAY IT IS SUPPOSED TO IT IS WHEN I AM DRIVING WITH THE GAS ON SO IT SEEMS TO BE SPEED SENSING

Dec 20, 2018

ELECTRICAL SYSTEM,VEHICLE SPEED CONTROL,UNKNOWN OR OTHER

2 complaints

THE SERVICE STABILITRAK LIGHT CONTINUES TO COME ON. WHEN IT DOES, ALMOST ALL OF THE LIGHTS ON THE DASH LIGHT UP AND THE CAR PUTS ITSELF IN NEUTRAL AND SHUTS OFF. THIS HAS HAPPENED 5 TIMES IN THE PAST TWO WEEKS. TWICE WITH MY [XXX] IN THE CAR. PARTS OF THIS DOCUMENT HAVE BEEN REDACTED TO PROTECT PERSONALLY IDENTIFIABLE INFORMATION PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). THE CAR WAS PURCHASED 12/23/2020 AND IT FIRST SHUT OFF WITH THE SERVICE STABILITRAK WARNING 12/31/2020. I'VE TAKEN IT TO THE DEALERSHIP FOR REPAIR. THEY REPLACED THE FRONT RIGHT WHEEL SENSOR TODAY AND IMMEDIATELY AFTER LEAVING THEIR LOT, IT SHUT OFF TWICE. I DID A SEARCH ON THE VIN AND FOUND THAT THIS VEHICLE HAD ISSUES AT 11K MILES AND 27K MILES. NOW AGAIN AT 55K MILES. THE CAR JUST SHUTS ITSELF OFF WHILE DRIVING. FIRST TIME IT HAPPENED, I WAS ROUNDING A CORNER IN HIGH TRAFFIC AND IN MID TURN, THE CAR SHUT OFF. I WAS ALMOST HIT BY SEVERAL CARS. THIS VEHICLE IS DANGEROUS. IT HAPPENED ONCE WHILE ON THE HIGHWAY WITH MY 15 MONTH OLD IN THE CAR AND TODAY IT HAPPENED TWICE WITH HER IN THE CAR.

Jan 06, 2021

RADIO PLAYS RANDOM RADIO STATIONS AND WILL NOT ALLOW RADIO TO BE TURNED OFF WHEN VEHICLE IS TURNED OFF ( NO POWER TO THE VEHICLE, DOORS ARE OPENED AND THE FOB IS OVER 500 FT AWAY). RADIO SCREEN FLASHES TO A BLANK SCREEN. DOES NOT READ CONTACT INFORMATION FOR CELLPHONE CONNECTED TO VEHICLE. WILL NOT ALLOW PHONE CALLS TO BE MADE AND WILL CONTINUE TO PLAY MUSIC THROUGH RADIO AND CAR SPEAKERS WHILE PHONE IS ENGAGED IN A TELEPHONE CALL ( ONCE CALL IS ABLE TO BE PLACED). ANDROID AUTO FEATURE STOPPED WORKING. VEHICLE WILL SLIP OUT OF GEAR AND RANDOMLY PUT SELF INTO AN OVERDRIVE. VEHICLE WILL NOT ACCELERATE DESPITE GAS PETAL BEING ALMOST TO THE FLOOR AND THEN WILL JUMP RAPIDLY AND ACCELERATE QUICKLY. VEHICLE SMELLS LIKE RUBBER IS BURNING UNDER THE HOOD AT VARIOUS TIMES.

Aug 20, 2020

POWER TRAIN,UNKNOWN OR OTHER

2 complaints

THE CAR KEEPS REVVING AND DOESN'T SHIFT INTO GEAR. YOU HAVE TO LIFT YOUR FOOT OFF THE GAS PEDAL AND GIVE IT A FEW SECONDS AND THEM PRESS IT AGAIN. HOWEVER WHEN YOU PRESS THE GAS AGAIN THE CAR JUMPS INTO GEAR CAUSING THE STEERING WHEEL TO JERK EITHER LEFT OR RIGHT. IT EITHER REVS TOO HIGH OR IT FEELS LIKE IT DOWNSHIFTS. THIS LAST TIME, 9/8/20, I JUST REVERSED OUT OF MY DRIVEWAY ONTO MY RESIDENTIAL STREET, GOING ABOUT 18 MPH WHEN THE CAR WOULD NOT SHIFT INTO 2ND GEAR. WHEN IT JERKED INTO GEAR IT JERKED THE STEERING WHEEL AND IT CAUSED ME TO HIT A PARKED CAR JUST 4 DOORS DOWN FROM MY HOUSE, CAUSING $6000 WORTH OF DAMAGE TO MY TERRAIN LIKELY TOTALING THE 2010 COROLLA I HIT. I HAVE HAD A CLEAN DRIVING RECORD FOR 30 YEARS UNTIL NOW. GMC WILL NOT OWN FAULT AND NOW MY INSURANCE WILL GO UP AS WELL FOR SOMETHING THAT REALLY WAS NOT MY FAULT.

Sep 10, 2020

Crash: 1

THE CAR AUTOMATIC BRAKING SYSTEM LOCKED UP AS DRIVING ON HIGHWAY. COULD NOT GET CAR TO MOVE.

Apr 02, 2019

ELECTRICAL SYSTEM,ENGINE

2 complaints

RECALL ON THE ENGINE BLOCK HEATER. THE DEALERSHIP IS UNABLE TO GET THE PART TO REPLACE. I TOOK IN OVER 6 MONTHS AGO AND STILL HAVE NOTHING.

Mar 01, 2020

TL* THE CONTACT OWNS A 2018 GMC TERRAIN. THE CONTACT STATED THAT THE VEHICLE'S ELECTRICAL SYSTEM FAILED. THE VENTS LOCATED NEAR THE INSTRUMENT PANEL EMITTED A STRONG BURNING ODOR WHEN THE HEATING SYSTEM OR AIR CONDITIONING SYSTEM WAS ACTIVATED. IN ADDITION, THE FRONT END OF THE VEHICLE EXHIBITED A STRONG VIBRATION THAT CAUSED THE STEERING WHEEL TO VIBRATE. FURTHERMORE, WHEN THE REAR HATCH DOOR WAS CLOSED, THE REAR HATCH DOOR LIGHT REMAINED ILLUMINATED. THE CONTACT STATED THAT THE REAR DRIVER'S SIDE HUB CLIPS SEPARATED. ON STAR PERFORMED A DIAGNOSTIC AND PROVIDED THE CONTACT WITH DIAGNOSTIC CASE NUMBER: 109309958. THE VEHICLE WAS TAKEN TO RAINBOW NORTHSHORE BUICK GMC (2925 NORTH HIGHWAY 190, COVINGTON, LA 70433, (888) 494-1484) FOR INSPECTION. THE DEALER ONLY CLEARED THE ON START CONNECTIVITY CODES AND INFORMED THE CONTACT THAT THERE WAS A DEFECTIVE MODULE. THE MANUFACTURER DID NOT HAVE A REMEDY FOR THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS CONTACTED. THE APPROXIMATE FAILURE MILEAGE WAS 4,000.

Nov 27, 2018

Fire: 1

SEATS

2 complaints

I ENTERED THE VEHICLE AND SAT IN THE FRONT PASSENGER SEAT. WHEN I SAT DOWN AND STARTED TO PUT ON MY SEAT BELT, I HEARD A LOUD POP AND THE SEAT BECAME UNSTABLE AND ROCKED BACK AND FORTH. THIS OCCURRED BEFORE THE VEHICLE WAS IN MOTION. I LOOKED UNDER THE SEAT AND NOTICED A BOLT HAD SNAPPED ON THE BOTTOM SEAT FRAME.

Sep 04, 2019

MANUEL LEVER TO LIFT LOWER AND RAISE THE HEIGHT KEEP COMING OFF THE TRACK . THIS WILL BE THE SECOND TIME , THAT I HAVE TO GO TO THE DEALERSHIP TO RESOLVE THIS ISSUE.

Jun 03, 2018

POWER TRAIN,ELECTRONIC STABILITY CONTROL (ESC),ENGINE

2 complaints

WHILE THE VEHICLE IS IN DRIVE IT LOSES PROPULSION WITHOUT NOTICE. THE VEHICLE STAYS IN DRIVE. THE VEHICLES RPM INCREASE AS YOUR FOOT IS ON THE ACCELERATOR BUT THE VEHICLE DOESN'T CONTINUE TO MOVE. THE ONLY WAY TO REGAIN PROPULSION IS TO COMPLETELY SHUT THE VEHICLE OFF AND THEN START UP AGAIN.

Apr 12, 2019

DRIVING ON A DOWNSLOPE HEADING NORTH ON 65 GOING INTO TENNESSEE FROM ALABAMA I EXPERIENCED A LOSS OF POWER SYSTEM LIGHTS WENT OFF ALONG WITH GAUGES GOING OFF AND ON. AT WHICH TIME STABIATRAK AND TRANSMISSION LIGHTS CAME ON SAYING TO PULL OVER IMMEDIATELY.WE DID SO CALLED GM ONSTAR WHERE THEY TOLD US WE WOULD EXPERIENCE A LOSS IN POWER BUT COULD TRAVEL ONWARD. WE CHOSE TO GET TOWED, HOWEVER DUE TO THE HOLIDAY WE HAD DIFFICULTIES GETTING A TOW AND WERE FORCED TO DRIVE HOME 90 MILES AWAY. THE PROBLEM DID NOT PRESENT ITSELF AGAIN ON THE DRIVE HOME. WE TOOK IT TO A GMC DEALER IN VESTAVIA HILLS THEY PULLED OFF THE CODES BUT HAD NO REASON FOR THE ISSUE NOR WERE THEY ABLE TO GET SERVICE BULLETINS FROM GM ON THE ISSUE. I DOCUMENTED THE FINDINGS WENT HOME AND A LATER ON 11/23/18 THE PROBLEM OCCURRED AT ABOUT 130 MILES FROM THE FIRST INCIDENT. THIS TIME IT HAPPENED GOING UP A HILL AND GIVING THE CAR GAS DID NOTHING TO GET ME UP THE VERY SMALL GRADE. I HAD TO PUT IT IN REVERSE AND GET A RUNNING START AT THE HILL IN ORDER TO MAKE IT HOME. I CALLED GM AGAIN AND REQUESTED A TOW TO A SECOND DEALER IN TRUSSVILLE, AL THEY WERE UNABLE TO EVEN SEE IT UNTIL MONDAY 11/26/18. I AM VERY FEARFUL THAT IF WE HAVE TO DRIVE IT AGAIN THAT I MAY NOT BE AS LUCKY.

Nov 25, 2018

POWER TRAIN,ELECTRICAL SYSTEM,LATCHES/LOCKS/LINKAGES

1 complaint

The contact owns a 2018 GMC Terrain. The contact stated that the transmission was shifting gear erratically. The contact stated that the doors were locking and unlocking independently, and the instrument cluster was blank. There was an abnormal beeping sound coming from the vehicle. Additionally, the contact stated that while at a traffic light, the Auto START/STOP feature delayed to respond. OnStar was alerted, but the contact declined to perform the service. The contact was in contact with the independent mechanic who sold the vehicle, but no assistance was provided. The local dealer was contacted. The vehicle was not diagnosed or repaired. The manufacturer was contacted, but no assistance was provided. The failure mileage was approximately 130,000. The VIN was not available.

Nov 07, 2025

SERVICE BRAKES, HYDRAULIC,AIR BAGS

1 complaint

The contact owns a 2018 GMC Terrain. The contact stated while driving at an undisclosed speed, the air bag and ABS warning lights illuminated. The vehicle was taken to Auto Zone to be diagnosed. The vehicle was diagnosed with air bag failure. The contact was informed that the air bag needed to be replaced. The vehicle was not repaired. The dealer was made aware of the failure; however, the contact was informed that there were no open recalls on the VIN. In addition, the contact was informed that once a recall repair was completed, it would not be performed a second time free of charge. The manufacturer was not made aware of the failure. The failure mileage was approximately 95,100.

Oct 17, 2025

LANE DEPARTURE,FORWARD COLLISION AVOIDANCE

1 complaint

It starts to “warn” you by the seat doing whatever it does and the dash lights up collision flashing and slams on the brakes when nothing is even around

Aug 22, 2025

POWER TRAIN,ENGINE,FUEL/PROPULSION SYSTEM

1 complaint

My check engine light comes on intermittently, since March 2024, after having Cabin & Engine air filters replaced. Each time, I’m told it is code P0171. This has happened too many times for my comfort. Usually, it happens around the time my gas gets below 1/2 tank or after I fill up my gas tank. Originally, I was told by the mechanic that it could be one of four things, of which I’ve now had some of things done. InIn Aug. 2024, the check engine light came in. Code was P0171. Mechanic replaced the Brake vacuum pump. Once incident, almost a month later, on 9/24/24, was very scary. While driving on the interstate, I got ready to increase my speed, but heard a pop sound and noticed the speed wouldn’t accelerate. Next, the check engine light came on and the message in the dash popped up saying “engine power reduced” or something similar. I was able to coast from the fast lane over to the slower lane and off the highway into a parking lot. I turned the truck off. When I crunk it back up an hour later, it was shaking and jerking. While slowly driving, on the way to the mechanic shop, it jerked and shook each time I tried to accelerate after stopping at a light or slowing down with traffic. The code again was P0171. According to the mechanic, the intake hose had popped off. On 11/13/24, the check engine light came on. I again took it to have the code scanned and truck looked at. Test results again showed P0171. This time the Mass Air Flow Sensor was suggested. In a year I’ve had the fuel system cleaned twice, brake system flushed, & other routine maintenance such as oil change & brakes. Yet, my check engine light seems to still come on intermittently atleast once monthly. It came on two days ago, 2/18/25, when my gas was around 1/4 tank full. I added a fuel system injector, per mechanic suggestion, and filled my tank up with gas on today, 2/20/25. The check engine light had gone off within about 15 mins of me driving. I’m certain it will be back on soon with the same code.

Feb 21, 2025

SERVICE BRAKES, HYDRAULIC,ENGINE

1 complaint

The contact owns a 2018 GMC Terrain. The contact stated while driving 40-45 MPH, the vehicle started coasting and stopped unintendedly. The contact stated that the vehicle drove for a while and then coasted and stopped. The message that the “Engine Power Reduced” was displayed. The contact stated that the brake system warning light was also illuminated. The vehicle was towed to an independent mechanic who determined that the camshaft had disintegrated into the engine. The mechanic informed the contact the vehicle was unrepairable. The vehicle was not repaired. The local dealer was not contacted. The manufacturer was not made aware of the issue. The failure mileage was approximately 60,000.

Dec 30, 2024

STRUCTURE

1 complaint

The strike plate on my rear driver door fell off. The plate and bolts are in perfect condition but the backing is gone. Multiple body shops have attempted to locate the backing, which is somewhere between the interior and exterior metal body pieces, and gave been unable to. Every body shop I've taken it to also says that they have never seen anything like this happen before. They are reluctant to fix it because that would mean cutting through the body to replace the backing for the strike plate then welding, sanding, and painting in the area they cut and they worry about the integrity of the striker and functionality of it as well, as they've never had to do a repair like this before. One of the body shops was also a certified GM repair shop at the dealership from which the car was purchased and even they have said the same as the others. They also encouraged me to report this to the NHTSA and GM as well because they've never seen it happen or heard of it happening and they are concerned because it is a safety issue. I know that there is a similar recall on some newer GMC Terrains and wonder if my issue would be related to the recall or if it's is a separate issue all together. The striker was barely touched and someone exited my back seat and fell off into a parking lot, I was able to recover the striker and both bolts which are completely undamaged and unworn. This is my only vehicle so I now have to hold my door shut with bungee cords and tape in order to use my vehicle. I have a child who is still in a car seat and must remain in the back seat for safety but now my backseat is also not very safe because of the door. A few days prior to the striker falling off my door would not close fully flush with the rest of the vehicle but still closed, locked, and remained closed with no other issues.

Dec 29, 2024

ENGINE AND ENGINE COOLING,FUEL SYSTEM, DIESEL

1 complaint

The contact owns a 2018 GMC Terrain. The contact stated while driving at approximately 65 MPH, the check engine warning light illuminated, and the vehicle decelerated to 20 MPH. Additionally, the message "Service Emissions" was displayed. The vehicle was taken to the local dealer who diagnosed that the diesel particulate filter was faulty and needed to be replaced. The vehicle was not yet repaired. The manufacturer was notified of the failure, but no assistance was offered. The contact was informed that the VIN was not included in the Extended Warranty coverage for the repair. The failure mileage was 26,000.

Dec 16, 2024

POWER TRAIN,VEHICLE SPEED CONTROL,FUEL/PROPULSION SYSTEM

1 complaint

Hello. As I come to a complete stop the car will go into auto-stop. After releasing the brake pedal the car will jerk forward . As I press the gas pedal the car Jerks and shakes . The rpm jumps way up and the mph say low.. there's been times I try to accelerate and the car with jerk and put itself into park.. in the middle of traffic.. heart pounding to say the lease. I also notice theres alot of black liquid dripping for the front right side under the front bumper. There were no problems with the car or lamp indicating there were before this. I went to where I brought the car and they told me my warranty expired and that I will need to pay $265 just to diagnose the issue. I didnt have that money. I do have a car code reader and I did my best to find a solution. Codes P0700, P171D, And P187D all appear on my device. I then looked up recalls and my VIN wasn't confirmed.. but I am certain it is the same issue . You do have a open recall for this very particular issue for my particular model . I love my car and GMC. Please remedy this situation and have me driving safely and free minded again and soon ! Please reach back with any feedback as soon as possible. Thanks !

Aug 08, 2024

VISIBILITY/WIPER,FORWARD COLLISION AVOIDANCE

1 complaint

The headliner fabric detached somehow from the panoramic track causing the fabric to hang down obstructing the rear and back window view causing a safety hazard. The automatic forward collision alert will come on for no reason since this has happened. The problem has not been reported to insurance or the manufacturer yet but GM is my next call. This is a safety hazard due to the obstruction of visibility to safely make turns or change lanes. This happened August 5th while driving with the windows up. It just dropped down still attached to the front of the track and the rear.

Aug 06, 2024

FORWARD COLLISION AVOIDANCE

1 complaint

I was in a car accident

Jul 18, 2024

Crash: 1

ELECTRICAL SYSTEM,STRUCTURE,ENGINE

1 complaint

Rear side windows in hatch area leaked filled up spare tire compartment with about 3-4 gallons of water. Now navigation doesn't want to work, sunroof not working, electric systems are not working right

Feb 25, 2024

POWER TRAIN,ELECTRICAL SYSTEM,ENGINE

1 complaint

There is an has been an issue with my electrical system says I purchased this car in 2017. Myself believe that the issues have not been documented until 2020. When my racy begins to run out, my engine light has been coming on and I’ve been getting the same code P1101 I took my vehicle to GMC and they told me that the engine light came on because the tape came loose. I brought this vehicle and there’s no way there should be no tape on it. The service tech also told me that if the problem continue to bring it back and I will have to pay $120 or whatever the label rate was for them to research I contacted GMC to file a complaint and I received the whole bunch of calls from a guy named Kevin. I believe he told me that he had been contacting [XXX] and no one returned his call and that he was sorry he couldn’t help me. This is my report number one of them from GMC. [XXX]. Everywhere I take my car they tell me that they have a lot of customers with the same issue and they tried to replace what the code is matching which is the mass airflow sensor but that does not help there is some type of problem with the engine or the electrical system with this vehicle. I am not the only consumer that has had this problem. I don’t know what to do. I have two kids I cannot afford to keep pay and label rate for them not to find the problem. I am also attaching the typical email that GMC sent out when they are working with the dealerships because I have been in contact with them and the person that was calling and then they sent me this email. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Dec 04, 2023

SERVICE BRAKES, AIR,FUEL SYSTEM, GASOLINE,SERVICE BRAKES

1 complaint

The contact owns a 2018 GMC Terrain. The contact stated that while driving at approximately 35 MPH going over a hill, the brake pedal was depressed but was firm and failed to depress as needed. The engine power reduced message was displayed and flashed on and then off. The brake assist warning light was illuminated. The service transmission message was displayed. The contact continued to depress the brake pedal until the vehicle responded as needed. The driver was able to pull into a parking lot, and the vehicle rolled to a stop. While driving, the engine misfired. Additionally, the vehicle failed to fully shutoff. The vehicle was towed to the local dealer, where it was diagnosed that the brakes had locked up and that the vacuum pump needed to be replaced. The contact was also informed that the cam shaft had fractured inside the engine. Additionally, the fuel injector, fuel line, and fuel pump needed to be replaced. The vehicle was not repaired. The contact related the failure to NHTSA Campaign Number: 19V645000 (Service Brakes, Hydraulic) and 23V013000 (Fuel System, Gasoline). The manufacturer was contacted, and the contact was informed that the VIN was under recall. The failure mileage was approximately 30,000.

Oct 02, 2023

POWER TRAIN,FORWARD COLLISION AVOIDANCE

1 complaint

Car is losing go power when accelerating on to interstate. It’s like the transmission loses power, the d illuminates, and then it kicks in to drive. It puts us at risk for an accident and I had a semi almost hit me because of this. This has been reproduced at the mechanic shop as well. No warnings before this happens

Sep 18, 2023

FUEL SYSTEM, DIESEL

1 complaint

The contact owns a 2018 GMC Terrain. The contact stated while driving approximately 30 MPH, the vehicle decelerated and failed to accelerate over 25 MPH while the accelerator pedal was depressed. The contact stated that a message was displayed on the instrument panel to “Continuously Drive Vehicle Above 30 MPH”. The contact stated that after the vehicle decelerated into engine power mode, the check engine warning light illuminated. The vehicle was taken to the dealer where it was diagnosed that the Diesel Particulate Filter (DPF) failed and needed to be replaced. Additionally, the contact stated that the vehicle was taken to the dealer twice where it was diagnosed that the Diesel Particulate Filter (DPF) needed to be unclogged. The vehicle was repaired; however, the failure recurred. The vehicle was not repaired. The manufacturer was notified of the failure and the contact was informed to contact the warranty company, but no further assistance was provided. The failure mileage was approximately 110,696.

Sep 05, 2023

STEERING,POWER TRAIN,FUEL/PROPULSION SYSTEM

1 complaint

My husband and son were involved in an almost fatal accident on 07/08/23 in our 2018 Terrain. My husband described that the vehicle spontaneously veered to the right uncontrollably, he was unable to steer to correct the vehicle, unable to brake, they went airborne, hit several poles and a transformer, rolled and flipped several times. All the airbags deployed.After the accident, I found a recall notice from back in 2017, I believe, regarding the drive train. My husband was extricated from the vehicle. My son wasble to cut the seatbelt and crawl out the window. From what my husband explained (he was the driver), this sounds like what they experienced during the collision. I never received a recall letter from GM as this is something I would of taken care of and have got repaired. Please see the photos and the recall I found. Please let me know if there is anyone else I need to contact regarsing this collision.My car was almost paid off. My husband and son could of lost their life. Please advise. Thank you!

Jul 09, 2023

Crash: 1

Injuries: 2

UNKNOWN OR OTHER,SERVICE BRAKES

1 complaint

Driving home from our local town 4/15/2023, the brake pedal became to hard to push down. Check engine light came on as I got to my driveway, and that is 1 mile from the main road. My kids were scared to tears as was my girlfriend. Run a scan and dtc p0557. Come to find the vacuum pump on the top drivers side of motor is the part that is bad it broke inside the valve cover. Looking up the issue and find out it is a known problem and no recall. I have kept the parts and all receipts for the repairs, I have to do myself cause the repairs are way to much for me to pay out of pocket. This is a serious issue for this car and year and GMC needs to address the issue. Why has nothing been done yet??? I am making payments on this car with no warranty for the car so I'm stuck fixing the car. But GMC knows that this is a problem and does nothing?!? I remember when American cars were good cars what happened to that time ?? And what happened to company's being responsible for the product they put out to customers? Guess that time is gone, I won't buy another American car again, unless it's a old Detroit built car.

May 01, 2023

SERVICE BRAKES, HYDRAULIC,POWER TRAIN

1 complaint

The contact owns a 2018 GMC Terrain. The contact stated while driving at various speeds, the brakes became inoperable. While the vehicle was in park(P), the gear shifter inadvertently shifted into an unintended gear. The brake assist warning light was flashing. The vehicle was taken to the local dealer where it was diagnosed that the vacuum pump and brake booster needed to be replaced. The vehicle was repaired four times but the failure persisted. The manufacturer was contacted and informed the contact to take the vehicle to a local dealer if the failure recurred. There was no additional assistance provided. The approximate failure mileage was 131,000.

Sep 15, 2022

TIRES

1 complaint

At ignition, vehicle tire pressure monitoring system indicated low tire pressure in rear right wheel of 9psi; right front tire indicated 38psi and left front and rear indicated 38psi. Driver verified pressure as good at 38psi in rear right tire with hand held gauge. While operating the vehicle on the interstate, vehicle driver experience a flat tire in the right front passenger tire. Tire Pressure monitoring system indicated 41psi in right front tire (even while flat), and indicated right rear tire at 0psi even though it was visually inflated.

Jul 29, 2022

ELECTRICAL SYSTEM,EXTERIOR LIGHTING,LANE DEPARTURE

1 complaint

Radio, hands free calling, and light on mirror shorting out. None of them work. It’s like it has a short in the wiring.

Jun 14, 2022

SEATS,VISIBILITY/WIPER

1 complaint

My driver seat does not raise or incline so it gives me like a visibility when I’m driving. The seat needs to be raised so I have more visibility on the road while I’m driving.

Apr 28, 2022

SEAT BELTS

1 complaint

The contact owns a 2018 GMC Terrain. The contact stated that while driving, the seat belt restraint warning light illuminated continuously while the driver’s and passenger’s seat belts were fastened. The dealer was informed of the failure. The vehicle was not repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 21,700.

Mar 29, 2022

ENGINE,FUEL/PROPULSION SYSTEM

1 complaint

Catalytic converter failed when driving damaging the engine. Vehicle undrivable and waited for repair at shop for over 90 days. Engine warning light keeps coming on with error code P1186 that the GMC dealer can not fix.

Dec 17, 2021

STEERING,ELECTRICAL SYSTEM

1 complaint

Multiple warning lights are appearing at once (Automatic brake assist, forward collision assist, parking brake released) When the car is put in reverse, the radio turns off for a brief moment and the steering assist warning shows on the dash. The steering wheel snatches back in the opposite direction causing a safety concern. The car also completely cuts off after the auto-stop takes effect at red lights causing me to have to pump the brakes at least twice to re-ignite and be able to accelerate.

Nov 16, 2021

ELECTRICAL SYSTEM,SERVICE BRAKES,FORWARD COLLISION AVOIDANCE

1 complaint

The "Service Brake Assist" issue in other 2018 GMC SUVs is happening in the 2018 GMC Terrain, but it is not part of the recall. Our brakes became EXTREMELY difficult to press right as we were turning onto the on ramp of an expressway. Thankfully we were smart enough to pull over and not get on the highway. Had we done so, I may not have been here to type this complaint. The brakes be come extremely difficult to press and that message shows. Dealership is going to charge me $400 to replace a vacuum pump - they were not interested in the information I have around this issue in other GMC SUVs since it isn't a formal recall on the Terrain. I could have died yesterday due to this braking issue. I've owned this car for 3 months.

Jun 01, 2021

POWER TRAIN,UNKNOWN OR OTHER,ENGINE

1 complaint

MY AUTO STARTED LEAKING SOME KIND OF OIL.NOT SURE WHAT KIND BUT I CAN SEE ACCUMULATION ON DRIVEWAY CONCRETE PAD. HAD MOTOR OIL & FILTER CHANGED IN CASE IT WAS A O-RING OR NOT TIGHT ENOUGH. IT CONTINUES TO LEAK.

Mar 29, 2021

ELECTRICAL SYSTEM,SERVICE BRAKES

1 complaint

WHEN RESTARTING AFTER VEHICLE "AUTO STOP" I AM GETTING "SERVICE BRAKE ASSIST" AND OCCASIONALLY "SERVICE ESC" WARNINGS. THESE WARNINGS WERE ASSOCIATED WITH BRAKE FAILURE IN GM SUV'S AND PICKUPS AND WERE SUBJECT TO A RECALL. NO SUCH RECALL EXISTS FOR THE TERRAIN. I HAVEN'T YET EXPERIENCED A BRAKE FAILURE BUT GM SEEMS TO WANT TO WAIT UNTIL I DO TO FIX THE PROBLEM.

Feb 25, 2021

VEHICLE SPEED CONTROL

1 complaint

TL* THE CONTACT OWNS A 2018 GMC TERRAIN. THE CONTACT STATED THAT WHILE PULLING INTO A BUILDING PARKING WHILE DEPRESSING THE BRAKE PEDAL, THE VEHICLE ACCELERATED, THE CONTACT TURNED THE STEERING WHEEL AND MISSED HITTING THE BUILDING. THE CONTACT STATED THAT SHE WAS NOT ABLE TO CONTROL THE VEHICLE WHILE DEPRESSING THE BRAKE PEDAL, AS A RESULT, THE CONTACT CRASHED INTO A POST. IN ADDITION, THE CONTACT STATED THAT SHE SHIFTED INTO PARK, THE VEHICLE CONTINUE TO ROLLED. THE CONTACT ENGAGED THE EMERGENCY BRAKE AND THE VEHICLE CAME TO A STOP. THE CONTACT STATED THAT SHE DID NOT NOTICED ANY WARNING LIGHTS ILLUMINATED BECAUSE THE FAILURE OCCURRED FAST. THE CONTACT DID NOT SUSTAINED INJURIES. A POLICE REPORT WAS FILED. THE VEHICLE WAS TOWED TO DON MOORE CHEVROLET BUICK GMC, 3232 VILLA POINT, OWENSBORO, KY 42303 (270) 215-1953, BUT WAS NOT YET DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND PROVIDED A CASE NUMBER. THE FAILURE MILEAGE WAS APPROXIMATELY 15,000. THE VIN WAS NOT AVAILABLE.

Dec 04, 2020

Crash: 1

ELECTRICAL SYSTEM,SERVICE BRAKES,ENGINE

1 complaint

MY 2018 GMC TERRAIN HAS MAJOR ISSUES THAT ALMOST CAUSED ME TO HIT A WALL ON THE EXPRESSWAY DUE TO A BRAKE ASSIST ISSUE THAT OTHER OWNERS HAVE A ISSUE WITH AND GMC HAS DONE NOTHING TO HELP THE BUYERS , WHERE CAN WE THE BUYERS GET HELP WITH ISSUES GMC IS WELL AWARE OF??

Sep 03, 2020

ELECTRICAL SYSTEM,UNKNOWN OR OTHER

1 complaint

MY CAR JUST COMPLETELY SHUT DOWN OUT OF NOWHERE. IT HAS HAPPENED TWICE WHEN I WAS SLOWING FOR TRAFFIC AND WHEN I WAS IN A PARKING LOT. THE FIRST TIME I COULDN'T GET OUT OF THE CAR BECAUSE THE DOOR WOULDN'T UNLOCK. THEN THE POWER CAME ON BUT THE CAR WOULD NOT TURN OVER. IT HAS PUSH BUTTON GEAR SHIFTS AND WOULD NOT GO INTO NEUTRAL. I HAD TO CALL THE POLICE TO ASSIST UNTIL THE CAR WAS TOWED BECAUSE I WAS ON A VERY BUSY AND DANGEROUS STREET. I HONESTLY WAS SCARED SOMEONE WAS GOING TO SLAM INTO ME. THE SECOND TIME I WAS LOOKING FOR A PARKING SPOT AND IT STOPPED. LUCKILY I ALWAYS KEEP THE DOORS UNLOCKED SINCE FIRST INCIDENT HAD TO BE TOWED BOTH TIMES. AS OF TODAY IT IS STILL AT THE DEALER TRYING TO BE FIXED FOR A SECOND TIME. THEY 'THOUGHT' THEY FIXED IT THE FIRST TIME BUT IT HAPPENED AGAIN. THE DEALER HAS HAD MY CAR SINCE OCTOBER 17. THEY CLAIM THEY KNOW WHAT IT IS. THEY REPLACE SOME ENGINE MODULE AND ARE NOW WAITING ON A PUSH BUTTON FOR THE GEAR SHIFT.

Nov 16, 2019

SUSPENSION,WHEELS

1 complaint

TL* THE CONTACT OWNS A 2018 GMC TERRAIN. WHILE DRIVING 80 MPH, THE REAR PASSENGER TIRE SHOOK AND VIBRATED LOUDLY. THE CONTACT TOOK THE VEHICLE TO ED BOZARTH CHEVROLET (2001 S HAVANA ST, AURORA, CO 80014, (720) 746-2716) WHERE IT WAS DIAGNOSED THAT THE TIRES WERE FAULTY. BOTH REAR TIRES WERE REPLACED, BUT THE FAILURE CONTINUED. THE MANUFACTURER WAS NOT NOTIFIED. THE FAILURE MILEAGE WAS UNKNOWN.

Jul 08, 2019

STEERING,SUSPENSION

1 complaint

THE VEHICLE WAS IN MOTION MAKING A RIGHT HAND TURN AND IN THE TURN THE OPERATOR LOST CONTROL OF THE VEHICLE CAUSING HER TO STRIKE A CURB THEN HEAD FOR ONCOMING TRAFFIC. WHEN IT WAS ALL SAID AND DONE IT LOOKED LIKE THE BALL JOINT HAD FAILED CAUSING THE LOSS OF CONTROL. A BYSTANDER SAID HE HEARD A LOUD POP AND LOOKED UP AND WITNESSED THE VEHICLE SLIDE INTO THE CURB AND THEN SEE THE FRONT LEFT TIRE LOCK UP AND THE VEHICLE COME TO A STOP.

May 21, 2019

Crash: 1

STEERING,WHEELS

1 complaint

WHILE DRIVING ON A SNOW- COVERED ROAD WITH ANY AMOUNT OF SNOW, THE SNOW GETS PACKED INSIDE OF THE WHEELS AND THROWS THE WHEEL BALANCE OFF CAUSING THE STEERING WHEEL TO SHIMMY BADLY AT HIGHWAY SPEEDS. I HAVE TO REMOVE THE SNOW PACK EVVERY DAY, AND I BELIEVE THAT THIS IS AN AERODYNAMIC DESIGN FLAW WITH THE WHEELS WHERE THE SNOW DOESN'T GET BLOWN OUT OF THE WHEEL WHILE THE CAR IS IN MOTION.

Mar 29, 2019

ELECTRONIC STABILITY CONTROL (ESC)

1 complaint

CONTINUE TO EXPERIENCE RADIO RESETTING (COMPLETELY SHUTTING DOWN AND RESETTING GIVING YOU THE GMC LOGO) AS YOU DRIVE DOWN THE ROAD, WITH PHONE CONNECTED WITH USB AND WITHOUT. CONTINUE TO EXPERIENCE USB NOT PRODUCING ENOUGH POWER TO MY PHONE TO RUN WAZE FROM THE USB PORT UNDER THE RADIO. PHONE CALLS WILL FADE IN AND OUT BETWEEN THE RADIO AND THE PHONE CALL...BEING CONNECTED VIA BLUETOOTH TO THE TRUCK. CONTINUE NOT BEING ABLE TO ANSWER THE CALLS VIA BLUETOOTH. TRUCK HAS BEEN INTO 2 DIFFERENT DEALERSHIPS....BOTH HAVE "RESET" THE SYSTEM...BUT IT CONTINUES TO DO THE SAME THINGS...OR SOMETHING NEW EVERY WEEK. PARTS HAVE BEEN ORDERED TO REPLACE USB PORT...STILL WAITING. BOUGHT THE CAR NEW....BEEN ONGOING...BEEN IN THE DEALERSHIPS 10-15 TIMES NOW. NO SOLUTION

Feb 18, 2019

UNKNOWN OR OTHER,FUEL/PROPULSION SYSTEM

1 complaint

MY VEHICLE HAS BEEN MAKING A NOISE EVERY SINCE THE DAY OF PURCHASE. IT STARTED AS A VAGUE SOUND AND HAS SINCE GOTTEN WORSE. THE NOISE IS COMING FROM THE REAR EXHAUST. AT CERTAIN SPEEDS OF TRAVEL THE NOISE GETS WORSE. I HAVE DONE A VISIBILITY CHECK OF THE REAR EXHAUST PIPE AND NOTICED THE ASSEMBLED EXHAUST WHERE IT WAS WELDED IS LOOSE AND SHAKING. I'M NOT FOR SURE IF THIS IS WHERE THE NOISE IS COMING FROM BUT IT COULD USE SOME INVESTIGATION. I PURCHASED MY VEHICLE WITH NO MILEAGE ABOUT 5 MONTHS AGO FROM HENNESSY GMC IN MORROW GEORGIA.

Feb 11, 2019

VISIBILITY/WIPER

1 complaint

AT NIGHT WHILE STOPPED, AS YOU SHIFT THE CAR INTO REVERSE, THE REAR VIEW CAMERA DISPLAY IS BLINDING BRIGHT. ITS BRIGHT LIGHT IS BEING REFLECTED BY THE WINDOWS BACK INTO THE CAR, MAKING IT IMPOSSIBLE TO SEE OUT THE WINDOWS OF THE VEHICLE. WHILE OTHER CAR FUNCTIONS - RADIO, PHONE, AND NAVIGATION - WHICH ALL USE THE SAME DISPLAY SCREEN AS THE BACKUP CAMERA, DIM THEMSELVES FOR NIGHT USE, THE REAR VIEW CAMERA DISPLAY IS AS BRIGHT AT NIGHT AS IT IS DURING THE DAY, CAUSING THIS ISSUE. THIS IS A PERMANENT, REPEATABLE ISSUE.

Dec 19, 2018

VISIBILITY/WIPER,BACK OVER PREVENTION

1 complaint

TL* THE CONTACT OWNS A 2018 GMC TERRAIN. WHILE DRIVING AT NIGHT AND ATTEMPTING TO BACK INTO THE DRIVEWAY, THE BACK UP CAMERA WAS TOO BRIGHT AND WAS DIFFICULT TO SEE. THE CONTACT STATED THAT THE SIDE VIEW MIRRORS DID NOT HELP DUE TO THE TINTED WINDOWS. THE VEHICLE WAS TAKEN TO SCHEPEL BUICK GMC (219-472-1449, LOCATED AT 3209 LINCOLN HWY, MERRILLVILLE, IN 46410) WHERE THE TECHNICIAN CONFIRMED THAT IT WAS A SAFETY ISSUE, BUT STATED THAT THERE WAS NO REMEDY. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND STATED THAT NOTHING COULD BE DONE. THE CONTACT WAS PROVIDED A CASE NUMBER. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 300. *TT*JB

Dec 11, 2018

POWER TRAIN,AIR BAGS,ENGINE

1 complaint

FIRST ISSUE WITH THE VEHICLE WAS A SEPARATION OF THE DASH NEAR AND AROUND THE PASSENGER SIDE AIRBAG. UNKNOWN AT THIS TIME IF THE AIRBAG HAS BEEN COMPROMISED. I WON'T KNOW UNTIL THE VEHICLE WOULD BE INVOLVED IN AN ACCIDENT. THE SECOND ISSUE INVOLVES THE VEHICLE WHILE IN PARK. I AM ABLE TO PUSH THE VEHICLE AND IT WILL ACTUALLY MOVE FORWARD. THERE IS ALSO A VERY HARD SHIFT WHILE THE VEHICLE IS IN MOTION. THIS OCCURS USUALLY BETWEEN 2K AND 3 K RPMS. THE VEHICLE WILL ACTUALLY JERK AS IT IS TRYING TO SHIFT.

Jun 22, 2018

VISIBILITY

1 complaint

TL* THE CONTACT OWNS A 2018 GMC TERRAIN. WHILE DRIVING AT 70 MPH, THE CONTACT HEARD AN EXPLOSION AND COASTED THE VEHICLE TO THE SIDE OF THE ROAD. THE CONTACT NOTICED THAT THE MOONROOF GLASS HAD SHATTERED. THERE WERE NO INJURIES. THE VEHICLE WAS TAKEN TO DIXIE BUICK GMC (AT 14565 S TAMIAMI TRAIL, FORT MYERS, FL 33912 AND WAS INFORMED THAT THEY COULD NOT LOCATE A FAILURE. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOTIFIED. THE APPROXIMATE FAILURE MILEAGE WAS 2,000. *TT THE CONSUMER STATED VEHICLE WAS FIXED BY STATE FARM INSURANCE COMPANY. *TR

Feb 05, 2018

AIR BAGS,STRUCTURE,SERVICE BRAKES

1 complaint

I PULLED INTO OUR CARPORT. IT FELT LIKE THE CAR JUST "SPED UP AND WENT FASTER AND FASTER." IT HIT THE FRONT OF THE CAR STRAIGHT ON. NO AIRBAGS DEPLOYED NOR DID THE FRONT END COLLISION STOP HAPPEN.

Jan 31, 2018

Crash: 1

ELECTRICAL SYSTEM,ELECTRONIC STABILITY CONTROL (ESC),SERVICE BRAKES

1 complaint

THE FIRST TIME WHILE DRIVING AT 60 MPH, THE VEHICLE INSTRUMENT PANEL WARNING LIGHTS ACTIVATED AND GAUGES FLUCTUATED FOLLOWED BY ACCELERATION, BRAKING AND STEERING MOVEMENT. THEN THE INFORMATION PANEL DISPLAYED STABILITRAK UNAVAILABLE, COLLISION WARNING UNAVAILABLE, LANE CHANGE ALERT UNAVAILABLE AND TRANSMISSION SERVICE. THE CAR THEN STARTED SHIFTING ERRATICALLY. THE 2ND TIME SAME SITUATION WHILE DRIVING 30-40 MPH.

Dec 28, 2017

2018 GMC Terrain Problems & Complaints

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