2020 GMC Sierra

The 2020 GMC Sierra is listed in 26 versions in the EPA fuel economy database, with 2.7 L 4-cyl turbo, 3.0 L 6-cyl turbo diesel, 4.3 L 6-cyl, 5.3 L 8-cyl and 6.2 L 8-cyl powertrains. Combined fuel economy ranges from 15 to 26 MPG (best: 9.0 L/100 km).

Model year2020
Versions26
ClassSpecial Purpose Vehicle 2WD, Special Purpose Vehicle 4WD, Standard Pickup Trucks 2WD, Standard Pickup Trucks 4WD
Drive4-Wheel Drive, Rear-Wheel Drive

Engines, transmissions & fuel economy

VersionPowertrainTransmissionDriveFuelMPG city / hwy / combL/100 km (comb)CO2 g/miClass
Sierra 2WD2.7 L 4-cyl turboAutomatic 8-spdRear-Wheel DriveRegular19 / 22 / 2011.8421Standard Pickup Trucks 2WD
Sierra 2WD2.7 L 4-cyl turboAutomatic 8-spdRear-Wheel DriveRegular20 / 23 / 2111.2421Standard Pickup Trucks 2WD
Sierra 2WD3.0 L 6-cyl turbo dieselAutomatic 10-spdRear-Wheel DriveDiesel23 / 30 / 269.0392Standard Pickup Trucks 2WD
Sierra 2WD4.3 L 6-cylAutomatic 6-spdRear-Wheel DriveRegular16 / 21 / 1713.8523Standard Pickup Trucks 2WD
Sierra 2WD5.3 L 8-cylAutomatic 6-spdRear-Wheel DriveRegular15 / 21 / 1713.8524Standard Pickup Trucks 2WD
Sierra 2WD5.3 L 8-cylAutomatic 6-spdRear-Wheel DriveGasoline or E8515 / 19 / 1614.7545Standard Pickup Trucks 2WD
Sierra 2WD5.3 L 8-cylAutomatic 8-spdRear-Wheel DriveRegular17 / 23 / 1912.4463Standard Pickup Trucks 2WD
Sierra 2WD5.3 L 8-cylAutomatic 8-spdRear-Wheel DriveRegular17 / 24 / 2011.8448Standard Pickup Trucks 2WD
Sierra 4WD2.7 L 4-cyl turboAutomatic 8-spd4-Wheel DriveRegular19 / 22 / 2011.8442Standard Pickup Trucks 4WD
Sierra 4WD2.7 L 4-cyl turboAutomatic 8-spd4-Wheel DriveRegular19 / 22 / 2011.8442Standard Pickup Trucks 4WD
Sierra 4WD3.0 L 6-cyl turbo dieselAutomatic 10-spd4-Wheel DriveDiesel22 / 26 / 249.8427Standard Pickup Trucks 4WD
Sierra 4WD4.3 L 6-cylAutomatic 6-spd4-Wheel DriveRegular15 / 20 / 1713.8532Standard Pickup Trucks 4WD
Sierra 4WD5.3 L 8-cylAutomatic 10-spd4-Wheel DriveRegular16 / 22 / 1912.4479Standard Pickup Trucks 4WD
Sierra 4WD5.3 L 8-cylAutomatic 6-spd4-Wheel DriveRegular15 / 20 / 1713.8530Standard Pickup Trucks 4WD
Sierra 4WD5.3 L 8-cylAutomatic 6-spd4-Wheel DriveGasoline or E8514 / 19 / 1614.7549Standard Pickup Trucks 4WD
Sierra 4WD5.3 L 8-cylAutomatic 8-spd4-Wheel DriveRegular16 / 22 / 1813.1490Standard Pickup Trucks 4WD
Sierra 4WD6.2 L 8-cylAutomatic 10-spd4-Wheel DrivePremium15 / 20 / 1713.8525Standard Pickup Trucks 4WD
Sierra 4WD AT43.0 L 6-cyl turbo dieselAutomatic 10-spd4-Wheel DriveDiesel22 / 26 / 249.8427Standard Pickup Trucks 4WD
Sierra 4WD AT45.3 L 8-cylAutomatic 10-spd4-Wheel DriveRegular16 / 21 / 1813.1494Standard Pickup Trucks 4WD
Sierra 4WD AT45.3 L 8-cylAutomatic 6-spd4-Wheel DriveRegular14 / 18 / 1614.7556Standard Pickup Trucks 4WD
Sierra 4WD AT45.3 L 8-cylAutomatic 8-spd4-Wheel DriveRegular16 / 21 / 1813.1486Standard Pickup Trucks 4WD
Sierra 4WD AT46.2 L 8-cylAutomatic 10-spd4-Wheel DrivePremium15 / 19 / 1713.8515Standard Pickup Trucks 4WD
Sierra Cab Chassis 2WD4.3 L 6-cylAutomatic 6-spdRear-Wheel DriveRegular15 / 19 / 1713.8523Special Purpose Vehicle 2WD
Sierra Cab Chassis 2WD5.3 L 8-cylAutomatic 6-spdRear-Wheel DriveRegular14 / 18 / 1515.7582Special Purpose Vehicle 2WD
Sierra Cab Chassis 4WD4.3 L 6-cylAutomatic 6-spd4-Wheel DriveRegular14 / 16 / 1515.7594Special Purpose Vehicle 4WD
Sierra Cab Chassis 4WD5.3 L 8-cylAutomatic 6-spd4-Wheel DriveRegular14 / 17 / 1515.7593Special Purpose Vehicle 4WD

Figures are EPA estimates for the U.S. market (U.S. gallons). Your mileage will vary. Transmissions: (S6) = 6-speed with manual select mode, (AV) = continuously variable, (AM) = automated manual.

Safety recalls

Check the NHTSA recall database for the 2020 GMC Sierra.

Tools for this car

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