| Digit | Usage | VIN | Decoded | |
|---|---|---|---|---|
| 1 | Mfgr | C | Chevrolet | |
| 2 | Chassis | P | Forward Control | |
| 3 | Engine | L | V8 350-4v 165hp LS9 or Cummins KT 450 Diesel | |
| 4 | Series | 4 | Unknown! | |
| 5 | Body | 3 | Cab & Chassis or Motor Home | |
| 6 | Year | 7 | 1977 | |
| 7 | Plant | V | Pontiac MI (GM Truck) | |
| 8-13 | Sequential Serial # | 319090 | 319090 |