Typical Cost of Fuel for a 2025 GMC Sierra
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It typically costs $4,075 a year to fuel a 2025 GMC Sierra, or about $340 a month. That is the U.S. Environmental Protection Agency's estimate for 15,000 miles of driving a year, at 17 MPG combined: 15 in the city and 19 on the highway.
This covers fuel only. Insurance, maintenance, tires, registration and loan payments are separate costs, and what you pay at the pump depends on local prices and how you drive.
Annual fuel cost
$4,075
a year, 15,000 miles
A month
$340
$4,075 ÷ 12
Every 100 miles
$27.17
$4,075 ÷ 15,000 × 100
Across the versions of the 2025 GMC Sierra
EPA rates 24 versions of this model, which differ by trim, engine or drivetrain. The typical figure is the median of them.
Cheapest version
$3,550a year
Typical version
$4,075a year
Costliest version
$5,500a year
1 other version is not counted here: plug-in hybrid, fuel-cell or all-electric versions, whose costs are not comparable with the rest.
Gas mileage of the 2025 GMC Sierra
EPA ratings for a typical version.
Combined
17MPG
City
15MPG
Highway
19MPG
Tailpipe CO2: 525 grams a mile. Fuel: diesel or premium gasoline or regular gasoline.
Where it sits among 2025 models
Each tick is the annual fuel cost of one of the 299 vehicles of model year 2025 on this site. The 2025 GMC Sierra is the 245th cheapest to fuel. Over five years EPA estimates it costs $8,375 more in fuel than the average new vehicle.
What this figure is
It is EPA's own annual cost estimate, the kind printed on a new car's window sticker. It assumes 15,000 miles a year, 55% of them in the city and 45% on the highway, at the national fuel prices EPA uses, which it revises from time to time.
To estimate your own cost, scale it by your mileage: someone who drives 10,000 miles a year would pay about two thirds of the figure. Fuel prices where you live move it too. The gas mileage ratings come from EPA's standard laboratory tests.
Common questions
How much does it cost to fuel a 2025 GMC Sierra for a year?
- EPA estimates $4,075 a year for a typical version, assuming 15,000 miles of driving and EPA's fuel prices. Across its 24 versions the estimate runs from $3,550 to $5,500.
How much is gas for a 2025 GMC Sierra per month?
- About $340 a month: EPA's annual estimate of $4,075 divided by 12. That works out to $27.17 for every 100 miles.
What gas mileage does a 2025 GMC Sierra get?
- A typical version is rated at 17 MPG combined: 15 in the city and 19 on the highway. Its versions range from 15 to 26 MPG combined.
What kind of gas does a 2025 GMC Sierra take?
- It depends on the version: EPA lists diesel or premium gasoline or regular gasoline.
Is a 2025 GMC Sierra cheap to fuel compared with other new cars?
- Over five years EPA estimates a typical version costs $8,375 more in fuel than the average new vehicle.
Source
U.S. Environmental Protection Agency and U.S. Department of Energy, Fuel Economy Data
Ratings for model year 2025. Retrieved on October 6, 2026.
fueleconomy.gov dataSource: U.S. Department of Energy and U.S. Environmental Protection Agency, fueleconomy.gov vehicle data. Annual fuel cost is EPA's estimate for 15,000 miles a year (55% city, 45% highway) at the fuel prices EPA assumes; your cost depends on how and where you drive.
Other model years
Other 2025 GMC models
Annual fuel cost for a typical version of each.