| 1989 | GMC | C3500 | Sierra Extended Cab Pickup 2-Door | 5.7L 350Cu. In. V8 GAS OHV Naturally Aspirated | |
| 1989 | GMC | C3500 | Sierra Cab & Chassis 2-Door | 5.7L 350Cu. In. V8 GAS OHV Naturally Aspirated | |
| 1989 | GMC | R3500 | Base Cab & Chassis 2-Door | 5.7L 350Cu. In. V8 GAS OHV Naturally Aspirated | |
| 1989 | GMC | R3500 | High Sierra Cab & Chassis 2-Door | 6.2L 379Cu. In. V8 DIESEL OHV Naturally Aspirated | |
| 1989 | GMC | C3500 | Sierra Standard Cab Pickup 2-Door | 6.2L 379Cu. In. V8 DIESEL OHV Naturally Aspirated | |
| 1989 | GMC | R3500 | High Sierra Cab & Chassis 4-Door | 5.7L 350Cu. In. V8 GAS OHV Naturally Aspirated | |
| 1989 | GMC | R3500 | Sierra Classic Cab & Chassis 2-Door | 6.2L 379Cu. In. V8 DIESEL OHV Naturally Aspirated | |
| 1989 | GMC | R3500 | Sierra Classic Cab & Chassis 2-Door | 5.7L 350Cu. In. V8 GAS OHV Naturally Aspirated | |
| 1989 | GMC | R3500 | High Sierra Crew Cab Pickup 4-Door | 5.7L 350Cu. In. V8 GAS OHV Naturally Aspirated | |
| 1989 | GMC | R3500 | Sierra Classic Crew Cab Pickup 4-Door | 6.2L 379Cu. In. V8 DIESEL OHV Naturally Aspirated | |
| 1989 | GMC | C3500 | Sierra SLX Extended Cab Pickup 2-Door | 5.7L 350Cu. In. V8 GAS OHV Naturally Aspirated | |
| 1989 | GMC | C3500 | Sierra SLX Cab & Chassis 2-Door | 7.4L 454Cu. In. V8 GAS OHV Naturally Aspirated | |
| 1989 | GMC | R3500 | High Sierra Standard Cab Pickup 2-Door | 6.2L 379Cu. In. V8 DIESEL OHV Naturally Aspirated | |
| 1989 | GMC | R3500 | Base Standard Cab Pickup 2-Door | 6.2L 379Cu. In. V8 DIESEL OHV Naturally Aspirated | |
| 1989 | GMC | R3500 | Base Standard Cab Pickup 2-Door | 5.7L 350Cu. In. V8 GAS OHV Naturally Aspirated | |
| 1989 | GMC | C3500 | Sierra SLX Cab & Chassis 2-Door | 5.7L 350Cu. In. V8 GAS OHV Naturally Aspirated | |
| 1989 | GMC | C3500 | Sierra SLE Extended Cab Pickup 2-Door | 6.2L 379Cu. In. V8 DIESEL OHV Naturally Aspirated | |
| 1989 | GMC | C3500 | Sierra SLE Cab & Chassis 2-Door | 5.7L 350Cu. In. V8 GAS OHV Naturally Aspirated | |
| 1989 | GMC | C3500 | Sierra SLE Standard Cab Pickup 2-Door | 5.7L 350Cu. In. V8 GAS OHV Naturally Aspirated | |
| 1989 | GMC | R3500 | Base Cab & Chassis 4-Door | 5.7L 350Cu. In. V8 GAS OHV Naturally Aspirated | |