| Digit | Usage | VIN | Decoded | |
|---|---|---|---|---|
| 1 | Mfgr | C | Chevrolet | |
| 2 | Chassis | P | Forward Control | |
| 3 | Engine | S | V8 454-4v 205/240hp LF8 (C Models) or L6 gas (heavy duty) | |
| 4 | Series | 3 | 1 ton | |
| 5 | Body | 7 | Motor Home chassis | |
| 6 | Year | 8 | 1978 | |
| 7 | Plant | 3 | Detroit MI | |
| 8-13 | Sequential Serial # | 308980 | 308980 |