← all 2008 GMC Sierra C15 2WD trims
2008 GMC Sierra C15 2WD — 6.2L 8-cyl, Automatic 6-spd, RWD
This 2008 GMC Sierra C15 2WD (6.2L 8-cyl, Automatic 6-spd, RWD) takes premium gasoline. PREMIUM
15
MPG combined (12 city / 19 hwy)
$4,680
est. fuel cost / year (today’s prices, 15k mi)
—
tailpipe CO₂
At today's AAA national average price ($4.68/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.
The EPA lists this trim as premium because that's the fuel the manufacturer specified for its mileage test. Many such engines will run on regular with slightly lower power and MPG — but check your owner's manual to see whether premium is required or just recommended.
Other 2008 GMC Sierra C15 2WD trims
| Trim | Fuel | MPG | Fuel/yr |
|---|---|---|---|
| 4.3L 6-cyl, Automatic 4-spd, RWD | REGULAR | 17 | $3,353 |
| 5.3L 8-cyl, Automatic 4-spd, RWD | REGULAR | 17 | $3,353 |
| 4.8L 8-cyl, Automatic 4-spd, RWD | REGULAR | 16 | $3,562 |
| 6.0L 8-cyl, Automatic 4-spd, RWD | REGULAR | 15 | $3,800 |
| 5.3L 8-cyl, Automatic 4-spd, RWD | FLEX-FUEL | 17 | $3,650 |
EPA fuel type: Premium · class: Standard Pickup Trucks 2WD · engine: 6.2L 8-cyl · transmission: Automatic 6-spd · drive: RWD · MPG retrieved 2026-07-24.