| Engines | EPA Estimated Fuel Economy (city/hwy) |
Fuel Tank Capacity (gallons) |
|
|---|---|---|---|
| Denali | |||
| 2WD Models with 6-speed Automatic Transmission | Vortec 6.2L V8 SFI E85-compatible, FlexFuel | 13/19 | 26 |
| 4WD Models with 6-speed Automatic Transmission | Vortec 6.2L V8 SFI E85-compatible, FlexFuel | 12/19 | 26 |