2025 GMC Sierra MPG
Official EPA fuel-economy rating for the 2025 GMC Sierra.
EPA combined fuel economy
16–26MPG
combined (55% city / 45% hwy)
City
17
MPG
Highway
21
MPG
Engine
2.7–6.2L
Cylinders
8
Drive
4WD
Class
Standard Pickup Trucks 2WD
Running cost
Estimated annual fuel cost
Per year
$2,499
15,000 mi/yr
Fuel used
714 gal
per year
At gas price
$3.50
per gallon
Based on 21 MPG combined and 15,000 miles per year. Adjust for your local gas price and annual mileage.
Other GMC Sierra years
FAQ
2025 GMC Sierra
- How many MPG does a 2025 GMC Sierra get?
- The 2025 GMC Sierra gets 16–26 MPG combined according to the EPA — about 17 MPG in the city and 21 MPG on the highway, depending on trim (13 configurations). Combined MPG is a 55% city / 45% highway blend.
- What is the annual fuel cost for a 2025 GMC Sierra?
- Driving 15,000 miles a year at 21 MPG combined, the 2025 GMC Sierra uses about 714 gallons of fuel per year — roughly $2,499 at $3.50/gallon. Your real cost varies with local gas prices and driving style.
- What is the difference between city and highway MPG on the 2025 GMC Sierra?
- The 2025 GMC Sierra returns 17 MPG city and 21 MPG highway. Highway is higher because steady-speed cruising avoids the stop-and-go acceleration that burns fuel in city driving. The 16–26 MPG combined figure blends the two.
- Is 21 MPG good for a standard pickup trucks 2wd?
- For a standard pickup trucks 2wd, 21 MPG combined is on the thirstier side. Hybrid trims and smaller engines, where offered, return better numbers.
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