The first three characters of a VIN are the World Manufacturer Identifier (WMI). 3GK is assigned to GMC, built in Mexico (North America). Any VIN that starts with 3GK decodes to GMC. The sample VINs below are checksum-valid and start with 3GK.
| Field | Value |
|---|---|
| WMI | 3GK (VIN positions 1–3) |
| Manufacturer | GMC |
| Country of assembly | Mexico |
| Region | North America (from the first character, 3) |
| Models seen here | Terrain |
GMC test VINs · Decode a 3GK VIN →
After the 3GK WMI, positions 4–8 describe the model, body and engine; position 9 is the mod-11 check digit; position 10 is the model year; position 11 is the assembly plant; and positions 12–17 are the serial number. See the full 17-digit VIN format.
3GK is a GMC WMI. Every VIN beginning with 3GK was built by GMC and decodes to that make.
The first character 3 places the manufacturer in Mexico (North America region) under the VIN standard.
No. They are synthetically generated but checksum-valid and use the real 3GK WMI, so a decoder returns GMC. No real vehicle's VIN is used.