GMC LB4, Z79, Engine
| Engine capacity | 4,293 cm³ |
| Maximum power (range), hp | 280 |
| Maximum torque, N*m (kg*m) at rpm. | 488 (50) / 3600 |
| Fuel used | Petrol |
| Engine type | V-shaped, 6-cylinder |
| Maximum power, hp (kW) at rpm | 280 (206) / 4400 |
| Compression Ratio (Range) | 8.35 |
| Cylinder diameter (range), mm | 101.6 |
| Piston stroke (range), mm | 88.4 |
| Supercharger | Turbine |
| Number of valves per cylinder (range) | 2 |