2026 GMC Sierra Gas Mileage (MPG)

The 2026 GMC Sierra is EPA-rated at 16–25 MPG combined (15–23 city / 18–28 highway) across 8 configurations. Source: EPA fueleconomy.gov. For a specific vehicle's history, see vincheck.it.com/check-vin.

Sierra 2WD — Auto 10-spd, 8 cyl, 5.3 L16 city / 20 hwy / 17 comb MPG · $3800/yr
Sierra 2WD — Auto 10-spd, 6 cyl, 3.0 L, Diesel, Turbo23 city / 28 hwy / 25 comb MPG · $3750/yr
Sierra 2WD — Auto 8-spd, 4 cyl, 2.7 L, Turbo18 city / 21 hwy / 20 comb MPG · $3250/yr
Sierra 2WD with Sport Mode — Auto 10-spd, 8 cyl, 5.3 L16 city / 21 hwy / 18 comb MPG · $3600/yr
Sierra 2WD with Sport Mode — Auto 8-spd, 4 cyl, 2.7 L, Turbo17 city / 21 hwy / 19 comb MPG · $3400/yr
Sierra 4WD — Auto 10-spd, 8 cyl, 6.2 L15 city / 19 hwy / 16 comb MPG · $5000/yr
Sierra 4WD — Auto 10-spd, 8 cyl, 5.3 L15 city / 18 hwy / 16 comb MPG · $4050/yr
Sierra 4WD — Auto 8-spd, 4 cyl, 2.7 L, Turbo17 city / 20 hwy / 18 comb MPG · $3600/yr

Frequently asked questions

What is the MPG of the 2026 GMC Sierra?

The 2026 GMC Sierra is EPA-rated at 16–25 MPG combined (15–23 city / 18–28 highway) across 8 configurations.

Is the 2026 GMC Sierra good on gas?

EPA combined ratings for the 2026 GMC Sierra range from 16–25 MPG. Higher combined MPG means lower annual fuel cost — see the per-configuration table above.

2026 GMC Sierra safety ratings · GMC Sierra common problems · 2026 GMC Sierra complaints · Full 2026 GMC Sierra VIN history

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