Hummer Duramax-6600, Engine
| Engine capacity | 6,619 cm³ |
| Maximum power (range), hp | 300 |
| Maximum torque, N*m (kg*m) at rpm. | 705 (72) / 1600 |
| Fuel used | Diesel fuel |
| Fuel consumption, l/100 km | 22 |
| Engine type | V-shaped, 8-cylinder |
| Maximum power, hp (kW) at rpm | 300 (221) / 3000 |
| Compression Ratio (Range) | 17 |
| Cylinder diameter (range), mm | 103 |
| Piston stroke (range), mm | 98.9 |
| Supercharger | Turbine |
| Number of valves per cylinder (range) | 2 |