← all 2014 GMC Sierra C15 2WD trims
2014 GMC Sierra C15 2WD — 5.3L 8-cyl, Automatic 6-spd, RWD
This 2014 GMC Sierra C15 2WD (5.3L 8-cyl, Automatic 6-spd, RWD) is flex-fuel (gasoline or E85). FLEX-FUEL
19
MPG combined (16 city / 23 hwy)
$3,300
est. fuel cost / year (EPA, 15k mi)
476 g/mi
tailpipe CO₂
EPA updated its fuel-economy equations again for model year 2017 — mostly affecting hybrids and turbocharged engines — and recalculated 2011-2016 ratings to match, in some cases 1-2 MPG lower. The number above already reflects that update.
Other 2014 GMC Sierra C15 2WD trims
| Trim | Fuel | MPG | Fuel/yr |
|---|---|---|---|
| 6.2L 8-cyl, Automatic 6-spd, RWD | REGULAR | 17 | $3,353 |
| 4.3L 6-cyl, Automatic 6-spd, RWD | FLEX-FUEL | 20 | $3,100 |
EPA fuel type: Gasoline or E85 · class: Standard Pickup Trucks 2WD · engine: 5.3L 8-cyl · transmission: Automatic 6-spd · drive: RWD · MPG retrieved 2026-07-24.