← all 2026 GMC Sierra 2WD trims
2026 GMC Sierra 2WD — 3.0L 6-cyl, Automatic 10-spd, RWD
This 2026 GMC Sierra 2WD (3.0L 6-cyl, Automatic 10-spd, RWD) runs on diesel. DIESEL
25
MPG combined (23 city / 28 hwy)
$2,868
est. fuel cost / year (today’s prices, 15k mi)
402 g/mi
tailpipe CO₂
At today's AAA national average price ($4.78/gal, 2026-07-05) — the EPA's own price/date assumption isn't exposed in the public dataset, so we recompute this from the EPA's MPG figure and a sourced current price.
Other 2026 GMC Sierra 2WD trims
| Trim | Fuel | MPG | Fuel/yr |
|---|---|---|---|
| 2.7L 4-cyl, Automatic 8-spd, RWD | REGULAR | 20 | $2,850 |
| 5.3L 8-cyl, Automatic 10-spd, RWD | REGULAR | 17 | $3,353 |
EPA fuel type: Diesel · class: Standard Pickup Trucks 2WD · engine: 3.0L 6-cyl turbo · transmission: Automatic 10-spd · drive: RWD · MPG retrieved 2026-07-24.