← all 2026 GMC Sierra 4WD with Sport Mode trims
2026 GMC Sierra 4WD with Sport Mode — 5.3L 8-cyl, Automatic 10-spd, 4WD
This 2026 GMC Sierra 4WD with Sport Mode (5.3L 8-cyl, Automatic 10-spd, 4WD) takes regular (87-octane) gasoline. REGULAR
17
MPG combined (15 city / 19 hwy)
$3,650
est. fuel cost / year (EPA, 15k mi)
522 g/mi
tailpipe CO₂
Other 2026 GMC Sierra 4WD with Sport Mode trims
| Trim | Fuel | MPG | Fuel/yr |
|---|---|---|---|
| 2.7L 4-cyl, Automatic 8-spd, 4WD | REGULAR | 17 | $3,650 |
EPA fuel type: Regular · class: Standard Pickup Trucks 4WD · retrieved 2026-06-14.