Photo: GMC Sierra by Ethan Llamas, CC BY-SA 4.0, via Wikimedia Commons. It shows the model, not always this exact version.
GMC · model year 2025
2025 GMC Sierra 2WD
Pickup · Rear-Wheel Drive · Diesel · EPA class: Standard Pickup Trucks 2WD
EPA figures · 2025fueleconomy.gov
26MPG combined
23/29MPG city / highway
$3,700fuel a year
399 g CO₂ per mile 3.0 L 6-cyl turbo Automatic 10-spd
This car on fueleconomy.gov, read 2 October 2026. Your own figures depend on how and where you drive.
Where it places
Against diesel cars and trucks by MPG
Chart average 23 MPGBest 26 MPG
Lowest on the chart $3,700Chart average $4,210
Every figure on record
- Combined MPG
- 26 MPG
- City MPG
- 23 MPG
- Highway MPG
- 29 MPG
- Annual fuel cost
- $3,700
- Tailpipe CO₂
- 399 g per mile
- Model year
- 2025
- Body
- Pickup
- EPA size class
- Standard Pickup Trucks 2WD
- Drive
- Rear-Wheel Drive
- Engine
- 3.0 L 6-cyl turbo
- Transmission
- Automatic 10-spd
- Fuel
- Diesel
Efficiency
Running cost
The car
Powertrain
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25 MPG · $3,850 fuel a year 2026 GMC Sierra 2WD
25 MPG · $3,850 fuel a year
2025 Chevrolet Tahoe 2WD
24 MPG · $4,000 fuel a year 2026 Chevrolet Tahoe 2WD
24 MPG · $4,000 fuel a year 2027 Chevrolet Tahoe 2WD
24 MPG · $4,000 fuel a year 2025 Chevrolet Silverado 4WD
24 MPG · $4,000 fuel a year