| engine type | Original performance | Performance after tuning | Vmax | More efficient | price |
|---|---|---|---|---|---|
| Vortec6000 V8 | 257 kW (347 hp) 515Nm | 279 kW (380 hp) 550Nm | * | 33 hp | 699 |
| 6.0 V8 | 265 kW (360 hp) | 294 kW (400 hp) + 60Nm | * | 40 hp | 699 |
| Vortec6200 V8 | 301 kW (403 hp) 563Nm | 323 kW (440 hp) 600Nm | * | 37 hp | 699 |