GMC VIN Decoder
GMC VIN Decoder
Last updated July 2026 · Reviewed by the VinWhere Vehicle Data Team · Source: NHTSA vPIC
A GMC VIN decoder reads a 17-character GMC Vehicle Identification Number to identify factory data such as model year, make, model, body style, engine, drivetrain, fuel type, manufacturer, country, and assembly plant when available. The first three characters are the World Manufacturer Identifier (WMI) — for example, 1GT identifies gmc trucks, incl. sierra (usa).
What a GMC VIN can tell you
A GMC VIN can reveal the model year, model, trim, engine, drivetrain, body style, fuel type, manufacturer, country, and assembly plant when available.
GMC VIN prefixes (WMI)
The first three characters of a GMC VIN identify the manufacturer, country, and vehicle type. Common GMC prefixes include:
| WMI prefix | Identifies |
|---|---|
| 1GT | GMC trucks, incl. Sierra (USA) |
| 1GK | GMC SUVs, incl. Yukon (USA) |
| 3GT | GMC built in Mexico |
Reading a GMC VIN
Truck and SUV focus
GMC builds trucks and SUVs, so its WMIs (1GT, 1GK) reflect those vehicle classes.
Position 10: model year
The 10th character encodes the GMC model year code.
GM platform sharing
GMC models often share platforms with Chevrolet, so VIN structure is closely related.
Sample GMC VIN decode
An example decode for a GMC VIN, showing the factory fields VinWhere returns:
- Year
- 2021
- Make
- GMC
- Model
- Sierra
- Body
- Pickup
- Engine
- 6.6L 8-cyl
- Drive
- 4WD/4-Wheel Drive/4x4
- Fuel
- Diesel
- Built in
- Flint, UNITED STATES (USA)
Example VIN for illustration. Decode your own GMC VIN above for exact results.
How to read a GMC VIN
Every 17-character GMC VIN follows the same position structure. The 10th character is the model year (see the VIN year chart) and the 11th is the assembly plant.
| Position(s) | Meaning |
|---|---|
| 1 | Country or region of manufacture (WMI) |
| 2 | Manufacturer (WMI) |
| 3 | Vehicle type or manufacturing division (WMI) |
| 4–8 | Vehicle attributes: model, body, engine, restraints (VDS) |
| 9 | Check digit (validates the VIN) |
| 10 | Model year |
| 11 | Assembly plant |
| 12–17 | Production sequence / serial number |
Common GMC models
VinWhere decodes VINs across the GMC lineup, including:
GMC build sheet by VIN
Can I get a GMC build sheet by VIN?
Yes. A GMC build sheet is the factory record of how a specific vehicle was originally built — its installed options, packages, and paint and trim codes. VinWhere reconstructs this from the VIN: it decodes the factory specification, then checks the original GMC window sticker (Monroney label), which lists the as-built options and original MSRP.
Start with the GMC window sticker lookup to see the original as-built options and MSRP for your VIN.
Where to find your GMC VIN
- Driver-side dashboard, through the windshield
- Driver door jamb sticker
- Vehicle registration and title
- Insurance card and policy
Data sources and limitations
GMC VIN decoding is based on manufacturer-reported vehicle data from the official NHTSA vPIC database, plus brand-specific window sticker providers where available. Some fields — trim, options, or window sticker — may be unavailable depending on the model year, vehicle type, and source. A VIN decode shows factory specifications only, never owner names, addresses, or private DMV records.
GMC VIN decoder FAQ
How do I decode a GMC VIN for free?+
Enter your 17-character GMC VIN into VinWhere's free decoder to see the model year, model, trim, engine, drivetrain, and assembly plant when available.
What does a GMC VIN starting with 1GT mean?+
A GMC VIN starting with 1GT identifies a GMC truck built in the United States, such as a Sierra.
Is a GMC VIN the same format as a Chevy VIN?+
Both follow the 17-character VIN standard and share GM conventions, but GMC and Chevrolet use different World Manufacturer Identifier prefixes.