2026 GMC Sierra 4WD AT4X
6.2L 8-cyl · 10-speed automatic · 4WD
Official EPA record #49408 from FuelEconomy.gov · data 2026-07-26 · every assumption below is yours to edit. How this is computed
Per month
$334.36
Per year
$4,012
Per mile
33.4¢/mi
5-year total
$20,060
Your own average replaces the EPA laboratory values — never averaged together with them — and the driving-mix setting stops applying, because a figure you measured already contains your own mix.
Notes & official EPA estimate
Official FuelEconomy.gov estimate: $5,150/year — assumes 15,000 miles/year and EPA price assumptions. The figures above use your inputs instead.
GMC Sierra: running costs for every model year →
Official EPA efficiency
| Measure | Value |
|---|---|
| City MPG | 14 |
| Highway MPG | 16 |
| Combined MPG | 15 |
Official EPA estimates
| Estimate | Value |
|---|---|
| Official annual fuel cost (15,000 mi/yr) | $5,150/yr |
| Tailpipe CO₂ | 601 g/mi |
| EPA greenhouse gas score | 2/10 |
| EPA smog rating | not published |
Source: U.S. EPA / DOE FuelEconomy.gov, vehicle record #49408 (record updated 2025-10-28). Snapshot processed 2026-07-26; page data last changed 2025-10-28.
Related configurations
Same year, same family
- Sierra 2WD with Sport Mode · 2.7L 4-cyl · 8-speed automatic · RWD2026
- Sierra 2WD · 2.7L 4-cyl · 8-speed automatic · RWD2026
- Sierra 2WD with Sport Mode · 5.3L 8-cyl · 10-speed automatic · RWD2026
- Sierra 2WD · 5.3L 8-cyl · 10-speed automatic · RWD2026
- Sierra 2WD · 3.0L 6-cyl · 10-speed automatic · RWD2026
- Sierra Mud Terrain Tires 4WD · 2.7L 4-cyl · 8-speed automatic · 4WD2026
- Sierra 4WD · 2.7L 4-cyl · 8-speed automatic · 4WD2026
- Sierra 4WD with Sport Mode · 2.7L 4-cyl · 8-speed automatic · 4WD2026
Adjacent model years
- Sierra 2WD · 3.0L 6-cyl · 10-speed automatic · RWD2025
- Sierra 2WD · 2.7L 4-cyl · 8-speed automatic · RWD2025
- Sierra 2WD · 2.7L 4-cyl · 8-speed automatic · RWD2025
- Sierra 2WD · 5.3L 8-cyl · 10-speed automatic · RWD2025
- Sierra 2WD · 5.3L 8-cyl · 10-speed automatic · RWD2025
- Sierra 4WD · 3.0L 6-cyl · 10-speed automatic · 4WD2025
- Sierra Mud Terrain Tires 4WD · 3.0L 6-cyl · 10-speed automatic · 4WD2025
- Sierra 4WD AT4X · 3.0L 6-cyl · 10-speed automatic · 4WD2025