| GMC VIN Plant Code | Assembly Plant |
|---|---|
| U | Hamtramck, Michigan Detroit/Hamtramck Assembly |
| V | Pontiac, Michigan Pontiac Assembly Center |
| W | Willow Run, Michigan Willow Run Assembly |
| X | Fairfax, Kansas Fairfax Assembly |
| Y | Wilmington, Delaware Wilmington Assembly |
| Z | Fort Wayne, Indiana Fort Wayne Assembly |
| Z | Fremont, California Fremont Assembly |
| Z | Spring Hill, Tennessee Spring Hill Manufacturing |
| 0 | Pontiac, Michigan Pontiac Assembly Center |
| 1 | Wentzville, Missouri Wentzville Assembly |
| 2 | Moraine, Ohio Moraine Assembly |
| 3 | Detroit, Michigan Detroit Truck Assembly |
| 4 | Orion, Michigan Orion Assembly |
| 5 | Bowling Green, Kentucky Bowling Green Assembly Plant |
| 6 | Oklahoma City, Oklahoma Oklahoma City Assembly |
| 7 | Lordstown, Ohio Lordstown Assembly |
| 8 | Shreveport, Louisiana Shreveport Operations |
| 9 | Detroit, Michigan Detroit Cadillac |