General Motors 90° V6 engine LB1 and LB4 LB1 and LB4

| Year_ | Horsepower | Torque | Fuel_System | Compression_Ratio | RPO | Applications |
|---|---|---|---|---|---|---|
| 1985–1986 | hp (kW) @ 4000 rpm | lb·ft (N·m) @ 2400 rpm | 4-BBL | 9.3:1 | LB1 | 123 |
| 1985 | hp (kW) @ 3600 rpm | lb·ft (N·m) @ 2000 rpm | TBI | 9.3:1 | LB4 | 45 |
| 1986–1990 | hp (kW) @ 4000 rpm | lb·ft (N·m) @ 2000 rpm | TBI | 9.3:1 | LB4 | 45 |
| 1987–1988 | hp (kW) @ 4200 rpm | lb·ft (N·m) @ 2000 rpm | TBI | 9.3:1 | LB4 | 5 |
| 1986 | hp (kW) @ 4000 rpm | lb·ft (N·m) @ 2400 rpm | TBI | 9.3:1 | LB4 | 3 |
| 1987–1992 | hp (kW) @ 4000 rpm | lb·ft (N·m) @ 2400 rpm | TBI | 8.6:1 | LB4(w/C6P emissions 2500&3500 series only) | 2 |