← all 2026 GMC Sierra 2WD with Sport Mode trims
2026 GMC Sierra 2WD with Sport Mode — 5.3L 8-cyl, Automatic 10-spd, RWD
This 2026 GMC Sierra 2WD with Sport Mode (5.3L 8-cyl, Automatic 10-spd, RWD) takes regular (87-octane) gasoline. REGULAR
18
MPG combined (16 city / 21 hwy)
$3,450
est. fuel cost / year (EPA, 15k mi)
495 g/mi
tailpipe CO₂
Other 2026 GMC Sierra 2WD with Sport Mode trims
| Trim | Fuel | MPG | Fuel/yr |
|---|---|---|---|
| 2.7L 4-cyl, Automatic 8-spd, RWD | REGULAR | 19 | $3,300 |
EPA fuel type: Regular · class: Standard Pickup Trucks 2WD · retrieved 2026-06-14.