| Digit | Usage | VIN | Decoded | |
|---|---|---|---|---|
| 1 | Mfgr | T | GMC | |
| 2 | Chassis | C | 2wd 96 inch or 106 inch conventional cab | |
| 3 | Engine | E | V8 427 gas | |
| 4 | Series | 6 | 2 ton C50 class 5 (16001-19500lb) | |
| 5 | Body | 7 | Motor Home chassis | |
| 6 | Year | 5 | 1975 | |
| 7 | Plant | V | Pontiac MI (GM Truck) | |
| 8-13 | Sequential Serial # | 570611 | 570611 |