GMC
Sierra 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