Half of all complaints arrive by 4 years of age, so 62.7% land after the 4-year basic warranty ends. The system owners report most is Power Train, with 45 complaints, typically at 4.5 years.
Cadillac CT6 years to avoid — and the best ones
| Model year | Per run | Complaints | Runs | Enough history? |
|---|---|---|---|---|
| 2020 | 11 | 9 | yes | |
| 2019 | 15 | 13 | yes | |
| 2018 | 12 | 10 | yes | |
| 2017 | 26 | 18 | yes | |
| 2016 | 11 | 11 | yes |
Among the 5 Cadillac CT6 years with enough history, the three to walk away from are 2017, 2020, 2018; the three worth hunting are 2016, 2019, 2018.
When it starts to break
| Age at failure | Complaints | Running total | Warranty |
|---|---|---|---|
| 0 years | 14.7% | covered | |
| 1 year | 20% | covered | |
| 2 years | 32% | covered | |
| 3 years | 37.3% | covered | |
| 4 years | 52% | you pay | |
| 5 years | 66.7% | you pay | |
| 6 years | 84% | you pay | |
| 7 years | 88% | you pay | |
| 8 years | 93.3% | you pay | |
| 9 years | 100% | you pay |
Basic warranty on this car is 4 years / 50,000 miles. Only 37.3% of reported failures happen inside it — the remaining 62.7% come out of the owner's pocket. Powertrain cover (4 years / 50,000 miles) reaches further, but it only covers the engine and transmission, which account for about 71% of the complaints here.
What actually fails — and at what age
On the Cadillac CT6, the early trouble is Service Brakes and Electrical System — reported at around 2.4 years, so a car still under warranty is the one to check for it. What waits further out is Power Train at 4.5 years — past every basic warranty, and the bill lands on whoever owns the car then.
| System | Complaints | Typical age | Crash | Fire |
|---|---|---|---|---|
| Power Train | 4.5 yrs | — | — | |
| Engine | 4.3 yrs | — | — | |
| Service Brakes | 2.4 yrs | 1 | — | |
| Electrical System | 4 yrs | — | — | |
| Forward Collision Avoidance | 3 yrs | 1 | — | |
| Suspension | 3.3 yrs | 1 | — | |
| Unknown Or Other | 3 yrs | 1 | — | |
| Fuel/propulsion System | 5 yrs | — | — |
What else in this class
6 models share the CT6's vehicle class. Per production run, the Dodge Charger draws 4.56, the Chrysler 300 4.11 and the Kia K5 3.08, against 1.23 for the CT6. That is the fewest complaints of the group.
| Same class as the CT6 | Complaints on record | Recall campaigns | Years built |
|---|---|---|---|
| Dodge Charger | 133 | 1983–2026 | |
| Chrysler 300 | 86 | 1999–2026 | |
| Kia K5 | 21 | 2021–2026 | |
| Hyundai Sonata | 152 | 1989–2026 | |
| Chevrolet Impala | 98 | 1981–2026 | |
| Lincoln Continental | 80 | 1981–2026 |
The table shows totals on record; the rates per production run are in the sentence above.
Good year or bad year — the VIN settles it.
- Check any VIN against complaints for its exact build year and plant
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Frequently asked questions
Is the Cadillac CT6 reliable?
By complaints per production run it is better than typical: 1.23 against 3.73 for the average car, and fewer than each of the 3 class rivals we compared.
Which CT6 years should you avoid?
By complaints per production run, 2017, 2020, 2018. The cleanest years old enough to judge are 2016, 2019, 2018. Years newer than 6 are left out: complaints keep arriving for years after a car is sold.
When do CT6 problems usually start?
Half of all complaints arrive by 4 years of age. The most reported system is Power Train, typically at 4.5 years, followed by Engine.
Will the warranty cover CT6 problems?
Mostly not: basic cover is 4 years / 50,000 miles, and only 37.3% of reported failures fall inside it. Powertrain cover lasts longer, but engine and transmission make up about 71% of the complaints here.
Is the CT6 more reliable than the Dodge Charger?
Yes: 1.23 complaints per production run for the CT6 against 4.56 for the Dodge Charger.
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