How many MPG does a 2021 GMC Sierra AT4 get?

The 2021 GMC Sierra AT4 gets 16–24 MPG combined according to the EPA — about 16 MPG in the city and 21 MPG on the highway, depending on trim (8 configurations). Combined MPG is a 55% city / 45% highway blend.

What is the annual fuel cost for a 2021 GMC Sierra AT4?

Driving 15,000 miles a year at 20 MPG combined, the 2021 GMC Sierra AT4 uses about 750 gallons of fuel per year — roughly $2,625 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 2021 GMC Sierra AT4?

The 2021 GMC Sierra AT4 returns 16 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 16–24 MPG combined figure blends the two.

Is 20 MPG good for a standard pickup trucks 4wd?

For a standard pickup trucks 4wd, 20 MPG combined is on the thirstier side. Hybrid trims and smaller engines, where offered, return better numbers.

2021 GMC Sierra AT4 MPG

Official EPA fuel-economy rating for the 2021 GMC Sierra AT4.

EPA combined fuel economy

16–24MPG

combined (55% city / 45% hwy)

City

MPG

Highway

MPG

Engine

3–6.2L

Cylinders

Drive

4WD

Class

Standard Pickup Trucks 4WD

Running cost

Estimated annual fuel cost

Per year

$2,625

15,000 mi/yr

Fuel used

750 gal

per year

At gas price

$3.50

per gallon

Based on 20 MPG combined and 15,000 miles per year. Adjust for your local gas price and annual mileage.

Other GMC Sierra AT4 years

2020 All years →

FAQ

2021 GMC Sierra AT4

How many MPG does a 2021 GMC Sierra AT4 get?: The 2021 GMC Sierra AT4 gets 16–24 MPG combined according to the EPA — about 16 MPG in the city and 21 MPG on the highway, depending on trim (8 configurations). Combined MPG is a 55% city / 45% highway blend.
What is the annual fuel cost for a 2021 GMC Sierra AT4?: Driving 15,000 miles a year at 20 MPG combined, the 2021 GMC Sierra AT4 uses about 750 gallons of fuel per year — roughly $2,625 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 2021 GMC Sierra AT4?: The 2021 GMC Sierra AT4 returns 16 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 16–24 MPG combined figure blends the two.
Is 20 MPG good for a standard pickup trucks 4wd?: For a standard pickup trucks 4wd, 20 MPG combined is on the thirstier side. Hybrid trims and smaller engines, where offered, return better numbers.

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