Every GMC Terrain (2018–2024) carries a 17-character VIN that begins with the 3GK WMI. The Terrain is a gas SUV; this page shows what each character of a GMC Terrain VIN means and gives 4 checksum-valid sample VINs you can drop straight into test fixtures. Synthetic — not real: no scraping, no real-owner data. The generator below is pre-filtered to the Terrain.
Each sample below is built from the real 3GK WMI and the Terrain's descriptor, so it decodes to a GMC Terrain of the right model year:
Have a real GMC Terrain VIN? Decode it →
Worked on the sample 3GKALMEVXJ6928056 — a 2018 GMC Terrain:
| Position | Section | Value | What it tells you |
|---|---|---|---|
| 1–3 | WMI | 3GK | Marks the VIN as GMC, built in Mexico |
| 4–8 | VDS | ALMEV | Descriptor for the Terrain — SUV body, gas powertrain |
| 9 | Check digit | X | Mod-11 checksum over the other 16 characters |
| 10 | Model year | J | Code J = 2018 |
| 11 | Plant | 6 | Assembly-plant code |
| 12–17 | Serial | 928056 | Sequential production number |
Positions 1–3 of every GMC Terrain VIN read 3GK — the World Manufacturer Identifier that marks the vehicle as GMC, assembled in Mexico (North America). After the WMI, positions 4–8 (ALMEV in our seed) describe the Terrain itself; see the full 17-digit format.
Position 10 encodes the model year. For the Terrain, 2018 is code J and 2024 is code R. See the 2024 year code or the check-digit math.
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A GMC Terrain VIN is 17 characters starting with the 3GK WMI, for example 3GKALMEVXJ6928056. Positions 4–8 describe the Terrain, position 9 is the check digit, position 10 is the model year, and 12–17 are the serial number.
Read it left to right: 3GK is the GMC WMI, positions 4–8 are the Terrain descriptor, position 9 verifies the VIN via a mod-11 checksum, position 10 gives the year, position 11 the plant, and 12–17 the serial. Paste any VIN into the decoder to do it automatically.
The Terrain in our seed uses the 3GK WMI (Mexico). Any VIN beginning with 3GK decodes to GMC.
No. They are synthetically generated but checksum-valid, use the real GMC 3GK WMI, and carry the Terrain's descriptor and a valid year code — so a decoder returns a GMC Terrain. No real vehicle's VIN is used.