Petrol | ||||
| 3.8 Buick LD5 V6 | 105 hp / 77kW | Rear Wheel Drive | 1976-1978 | |
| 3.8 Buick LD5 V6 | 110 hp / 81kW | Rear Wheel Drive | 1980-1981 | |
| 3.8 Buick LD5 V6 | 115 hp / 85kW | Rear Wheel Drive | 1978-1980 | |
| 4.3 Pontiac LS 5 Small-Block V8 | 120 hp / 88kW | Rear Wheel Drive | 1979-1981 | |
| 4.9 Pontiac 301 Small-Block V8 | 130 hp / 96kW | Rear Wheel Drive | 1978-1979 | |
| 4.9 Pontiac 301 Small-Block V8 | 135 hp / 99kW | Rear Wheel Drive | 1976-1977 | |
| 4.9 Pontiac 301 Small-Block V8 | 140 hp / 103kW | Rear Wheel Drive | 1977-1978 | |
| 5.0 Oldsmobile LV2 Small-Block V8 | 145 hp / 107kW | Rear Wheel Drive | 1980-1981 | |
| 4.9 Pontiac 301 Small-Block V8 | 150 hp / 110kW | Rear Wheel Drive | 1979-1980 | |
| 4.9 Pontiac 301 Small-Block V8 4-bbl. | 150 hp / 110kW | Rear Wheel Drive | 1978-1979 | |
| 5.7 Buick 350 Small-Block V8 | 155 hp / 114kW | Rear Wheel Drive | 1977-1980 | |
| 5.7 Oldsmobile 350 Rocket V8 | 160 hp / 118kW | Rear Wheel Drive | 1978-1980 | |
| 5.7 Oldsmobile 350 Rocket V8 | 170 hp / 125kW | Rear Wheel Drive | 1976-1978 | |
| 6.6 Oldsmobile 403 Small-Block V8 | 175 hp / 129kW | Rear Wheel Drive | 1978-1979 | |
| 6.6 Pontiac 400 Small-Block V8 | 180 hp / 132kW | Rear Wheel Drive | 1976-1978 | |
| 6.6 Oldsmobile 403 Small-Block V8 | 185 hp / 136kW | Rear Wheel Drive | 1976-1978 | |
Diesel | ||||
| 5.7 Oldsmobile LF9 V8 | 105 hp / 77kW | Rear Wheel Drive | 1980-1981 | |
| 5.7 Oldsmobile LF9 V8 | 120 hp / 88kW | Rear Wheel Drive | 1979-1980 | |