2020 GMC Sierra

US · Pickup · Standard Pickup Trucks 2WD

The 2020 GMC Sierra is listed in the US market as a pickup. Every figure below carries the source it came from, and anything our sources do not publish is left out rather than estimated.

Engine: Varies by configuration: 2.7L 4-cylinder turbocharged (SIDI; 4-mode/Sport transmission), 2.7L 4-cylinder turbocharged (SIDI; 3-mode transmission (work truck), 3.0L 6-cylinder turbocharged, 4.3L 6-cylinder (SIDI), 5.3L 8-cylinder (SIDI), 5.3L 8-cylinder (SIDI; FFV), 5.3L 8-cylinder (SIDI; XFE Package), 6.2L 8-cylinder (SIDI)
Transmission: Automatic
Drivetrain: Varies by configuration: RWD, 4WD
Fuel: Varies by configuration: Gasoline, Diesel, Flex fuel
Economy: 15 mpg (15.7 L/100 km) to 26 mpg (9.0 L/100 km) combined

Generic outline for this body type. An illustration, not a photograph.

Specifications at a Glance

Key Figures

Units:

Engine / Powertrain

2.7L 4-cylinder turbocharged (SIDI; 4-mode/Sport transmission), 2.7L 4-cylinder turbocharged (SIDI; 3-mode transmission (work truck), 3.0L 6-cylinder turbocharged, 4.3L 6-cylinder (SIDI), 5.3L 8-cylinder (SIDI), 5.3L 8-cylinder (SIDI; FFV), 5.3L 8-cylinder (SIDI; XFE Package), 6.2L 8-cylinder (SIDI)

Combined Economy

15 mpg (15.7 L/100 km) to 26 mpg (9.0 L/100 km) combined

Drivetrain

RWD, 4WD

Transmission

Automatic

Market: US·Switch units to convert the figures shown.

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Engine

Engine
Specification	Value	Source
Engine	Varies by configuration: 2.7L 4-cylinder turbocharged (SIDI; 4-mode/Sport transmission), 2.7L 4-cylinder turbocharged (SIDI; 3-mode transmission (work truck), 3.0L 6-cylinder turbocharged, 4.3L 6-cylinder (SIDI), 5.3L 8-cylinder (SIDI), 5.3L 8-cylinder (SIDI; FFV), 5.3L 8-cylinder (SIDI; XFE Package), 6.2L 8-cylinder (SIDI)
Displacement	2.7 L to 6.2 L
Cylinders	4 to 8
Aspiration	Turbocharged
Fuel type	Varies by configuration: Gasoline, Diesel, Flex fuel	EPA fueleconomy.gov

Transmission and drivetrain

Transmission and drivetrain
Specification	Value	Source
Transmission	Automatic	EPA fueleconomy.gov
Gears	6 to 10
Drivetrain	Varies by configuration: RWD, 4WD

Fuel economy and range

Fuel economy and range
Specification	Value	Source
Combined	15 mpg (15.7 L/100 km) to 26 mpg (9.0 L/100 km)	EPA fueleconomy.gov
City	14 mpg (16.8 L/100 km) to 23 mpg (10.2 L/100 km)
Highway	16 mpg (14.7 L/100 km) to 30 mpg (7.8 L/100 km)

Our sources do not publish these for this vehicle: Power, Torque, Electric range, Battery capacity. We leave them out instead of estimating.

Trims and configurations

26 configurations listed by our sources. Engines, drivetrains and fuel economy can differ between them.

Recalls

No recall campaigns were found in NHTSA data at the last check. Last checked November 8, 2026.

Data sources

EPA fueleconomy.gov · retrieved November 4, 2026 · US Government public data
NHTSA vPIC · retrieved October 12, 2026 · US Government public data

Source checked: November 4, 2026

Data verified: November 4, 2026

Specifications can vary by market, trim, configuration and production date. Confirm with the manufacturer before buying parts or making safety decisions. Report an error.

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Frequently asked questions

What engine does the 2020 GMC Sierra have?

Varies by configuration: 2.7L 4-cylinder turbocharged (SIDI; 4-mode/Sport transmission), 2.7L 4-cylinder turbocharged (SIDI; 3-mode transmission (work truck)), 3.0L 6-cylinder turbocharged, 4.3L 6-cylinder (SIDI), 5.3L 8-cylinder (SIDI), 5.3L 8-cylinder (SIDI; FFV), 5.3L 8-cylinder (SIDI; XFE Package), 6.2L 8-cylinder (SIDI). Engines can differ by trim, so check the trim list below.

What is the fuel economy of the 2020 GMC Sierra?

Combined fuel economy is 15 mpg (15.7 L/100 km) to 26 mpg (9.0 L/100 km), as published by the source shown in the specification table.

Is the 2020 GMC Sierra front-wheel, rear-wheel or all-wheel drive?

Drivetrain: Varies by configuration: RWD, 4WD.

Are there recalls for the 2020 GMC Sierra?

No recall campaigns were found in NHTSA data when we last checked on November 8, 2026. Recall status can change, so confirm with NHTSA or the manufacturer.