GMC
Sierra Mud Terrain Tires 4WD FFV
U.S. fuel economy and specifications from the EPA.
17Best combined MPG2026 model year
2026Model years1 with EPA ratings
1Rated configurationDrive, transmission and engine
5.3 LEngine sizeDisplacement
1 configuration.
4-Wheel Drive · Automatic 10-spd
Regular gasoline or E85 · Standard Pickup Trucks 4WD
- Combined MPG on regular gasoline
- 17
- Combined MPG on E85
- 12
- Engine displacement
- 5.3 L
- Cylinders
- 8