← all 2025 GMC Sierra 4WD AT4X trims
2025 GMC Sierra 4WD AT4X — 6.2L 8-cyl, Automatic 10-spd, 4WD
This 2025 GMC Sierra 4WD AT4X (6.2L 8-cyl, Automatic 10-spd, 4WD) takes premium gasoline. PREMIUM
15
MPG combined (14 city / 16 hwy)
$5,150
est. fuel cost / year (EPA, 15k mi)
601 g/mi
tailpipe CO₂
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 2025 GMC Sierra 4WD AT4X trims
| Trim | Fuel | MPG | Fuel/yr |
|---|---|---|---|
| 3.0L 6-cyl, Automatic 10-spd, 4WD | DIESEL | 19 | $4,100 |
EPA fuel type: Premium · class: Standard Pickup Trucks 4WD · retrieved 2026-06-14.