A GMC VIN is 17 characters. Positions 1–3 say who built it and where, 4–8 describe the body and engine, 9 is a check digit, 10 is the model year, 11 is the plant, and 12–17 are the serial number. On a GMC those first three characters are almost always 1GT, 1GK, 3GT — 85% of the 2,812 VINs decoded here start with one of them.
Got a VIN from another make? The free VIN decoder reads any 17-character VIN, whatever built it.
How to read a GMC VIN
Here is a real 2027 GMC VIN from our database, split into its parts:
VIN 1GKS2JKL7VR117128 — decoded free on its own report page.
| Position | Section | What it tells you |
|---|---|---|
| 1–3 | WMI | World Manufacturer Identifier — country, manufacturer and vehicle type. |
| 4–8 | VDS | Vehicle Descriptor Section — body style, engine, restraint system, series. |
| 9 | Check digit | A calculated digit that validates the whole VIN. Wrong digit = wrong VIN. |
| 10 | Model year | One character for the model year. Letters skip I, O, Q, U and Z. |
| 11 | Plant | The assembly plant that built the car. |
| 12–17 | Serial | Sequential production number of this exact vehicle. |
Which GMC is it? Read the first three characters
Characters 1–3 are the World Manufacturer Identifier, and GMC runs 13 of them across 4 countries, so on a GMC the prefix alone tells you which line the car came off and what body it was built as. Counted across 2,812 GMC VINs decoded here:
| WMI | Built in | Vehicle type | Models under this code | VINs on file |
|---|---|---|---|---|
| 1GT | United States | — | C/K Pickup, Canyon, Hummer EV Pickup, R Conventional, Safari + 7 more | |
| 1GK | United States | — | Acadia, Envoy, Hummer EV SUV, Jimmy, Jimmy Utility + 6 more | |
| 3GT | Mexico | — | Sierra, Sierra Limited, Yukon | |
| 3GK | Mexico | — | Suburban, Terrain, Yukon, Yukon XL | |
| 2GT | Canada | — | GMT-400, Sierra, Sierra Limited | |
| 1GD | United States | — | C4, C5, C6, C7, Rally + 6 more | |
| 2GK | Canada | — | Terrain | |
| 7GZ | New Zealand | — | Savana | |
| 2CT | Canada | — | Terrain | |
| 2GD | Canada | — | Cutaway Van, Rally, Sierra | |
| 1GJ | United States | — | Savana | |
| 4KD | United States | — | W4 | |
| 1G5 | United States | — | S15 Utility |
Country and vehicle type come from the NHTSA manufacturer registry; the model column is counted from GMC VINs decoded on ForCar, so it reflects what people actually own, not the full production catalog.
Model-year codes for GMC
Position 10 carries the model year, skipping I, O, Q, U and Z. The alphabet comes round every 30 years, which for GMC has already happened — 1997 and 2027 share the character V. All 47 model years of GMC, 1981 to 2027, with the character each one carries:
| Model year | VIN character (position 10) | Same character as |
|---|---|---|
| 2027 | V | 1997 |
| 2026 | T | 1996 |
| 2025 | S | 1995 |
| 2024 | R | 1994 |
| 2023 | P | 1993 |
| 2022 | N | 1992 |
| 2021 | M | 1991 |
| 2020 | L | 1990 |
| 2019 | K | 1989 |
| 2018 | J | 1988 |
| 2017 | H | 1987 |
| 2016 | G | 1986 |
| 2015 | F | 1985 |
| 2014 | E | 1984 |
| 2013 | D | 1983 |
| 2012 | C | 1982 |
| 2011 | B | 1981 |
| 2010 | A | — |
| 2009 | 9 | — |
| 2008 | 8 | — |
| 2007 | 7 | — |
| 2006 | 6 | — |
| 2005 | 5 | — |
| 2004 | 4 | — |
| 2003 | 3 | — |
| 2002 | 2 | — |
| 2001 | 1 | — |
| 2000 | Y | — |
| 1999 | X | — |
| 1998 | W | — |
To tell the two apart on a car or light truck, look at position 7: a number for 1980–2009 models, a letter from 2010 on.
Body and engine characters we see on GMC VINs
Positions 4–8 are the maker's own build code. Across 2,812 VINs GMC uses 18 different characters in positions 4, 5 and 8:
| Position | Characters seen on real VINs | Variety |
|---|---|---|
| 4 — body | U (23%) · S (16%) · 4 (10%) · E (8%) · A (7%) · P (7%) | 6 distinct |
| 5 — series | 2 (26%) · U (18%) · 9 (13%) · L (8%) · K (7%) · N (6%) | 6 distinct |
| 8 — engine | D (14%) · L (13%) · C (9%) · 8 (8%) · Y (8%) · S (6%) | 6 distinct |
What a decoded GMC VIN gets you
Behind a GMC VIN: 30,068 owner complaints and every recall campaign NHTSA has on record:
| Data | For this brand | Source |
|---|---|---|
| Models covered | 25 GMC models | ForCar catalog |
| Recall campaigns | 333 across the brand | NHTSA |
| Owner complaints | 30,068 filed by GMC owners | NHTSA |
| Model years covered | 46 years (1981–2026) | ForCar catalog |
| VINs already decoded | 2,812 GMC VINs on file | ForCar |
Where to find the VIN on a GMC
Before hunting for the plate, know what you are looking for: a genuine GMC VIN opens with one of 1GT, 1GK, 3GT, 3GK, 2GT, 1GD. Four places on a GMC carry that number, and all four must read the same — a mismatch on this brand is where fraud shows itself first.
| Where | How to see it | Why it matters |
|---|---|---|
| Dashboard, driver side | Through the windshield, bottom corner | Easiest to check before you touch anything |
| Driver door jamb | Open the door, sticker on the pillar | Also lists tire pressures and build date |
| Under the hood | Firewall or strut tower plate | Survives a windshield replacement |
| Title and insurance | Paper documents | Must match the car — a mismatch means fraud or a swapped panel |
Decode a VIN by GMC model
Codes in positions 4–8 are assigned per model, not per brand, and GMC has 25 of them in our catalog. 7 of the prefixes above cover more than one model, so the table on this page narrows it down but does not finish the job. Open the GMC you own for the plants, year codes and build characters that apply to it alone.
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Frequently asked questions
Is this GMC VIN decoder free?
Yes — decoding a GMC VIN costs nothing and needs no account. Beyond the year, plant and build characters you also get what NHTSA holds on the GMC — 333 recall campaigns and 30,068 owner complaints — at no charge.
What do the first three characters of a GMC VIN mean?
That block is the World Manufacturer Identifier, and on a GMC it resolves to one of 13 codes — each tying the car to a plant country and a body type before you read any further. The ones that turn up most on GMC VINs here are 1GT (United States — C/K Pickup, Canyon, Hummer EV Pickup); 1GK (United States — Acadia, Envoy, Hummer EV SUV); 3GT (Mexico — Sierra, Sierra Limited, Yukon). The full list, with the models built under each, is in the table above.
Where was my GMC built?
Character 11 names the plant, but the country is already set by characters 1–3. Of the 2,812 GMC VINs decoded on ForCar, assembly splits as United States 69%, Mexico 25%, Canada 5%, New Zealand 0%. Match your first three characters to the table above to see which one is yours.
How many characters is a GMC VIN?
Seventeen, on every GMC built from 1981 onwards, when the 17-character format became mandatory in the US. The oldest GMC VIN on file here is a 1981, so everything in our GMC data already uses the modern layout.
Why do two GMC model years share the same VIN character?
Position 10 cycles through the alphabet every 30 years, skipping I, O, Q, U and Z. For GMC that is not theoretical: a 1997 and a 2027 both carry V in position 10, and this brand was built in both years. Position 7 tells them apart on cars and light trucks: a number for 1980–2009 models, a letter from 2010 on.
Can a GMC VIN tell me if the car was in an accident?
Not from the characters themselves — they describe how the GMC left the factory, not what happened to it afterwards. Crash and title records sit in separate databases keyed to the same number. What is public are the 30,068 complaints GMC owners filed with NHTSA, and those we do show. Run the number through our VIN check to see what is on the record for it.
Do the body and engine characters mean the same thing on every GMC?
No, and that is the usual mistake — positions 4–8 are assigned per model, not per brand. A letter that means one body on a GMC means something else entirely on another marque. On GMC VINs the character that dominates position 4 is U — read it against the table above, not against a generic chart.
What if the VIN on the dashboard doesn't match the door jamb?
Treat it as a red flag on any car, and on a GMC check the prefix first: if the first three characters are not one of the 13 codes listed above, the plate did not come from this brand at all. Beyond that, mismatched plates mean either a replaced panel or a tampered identity — ask for documents and verify before any money changes hands.
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