2012 GMC Sierra
US · Pickup · Standard Pickup Trucks 2WD
The 2012 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 Every figure below carries the source it came from, and anything our sources do not publish is left out rather than estimated.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: 6.0L 8-cylinder, 4.3L 6-cylinder, 4.8L 8-cylinder (FFV), 5.3L 8-cylinder (FFV), 6.2L 8-cylinder (FFV)
- Power
- Not available
- Torque
- Not available
- Transmission
- Automatic
- Drivetrain
- Varies by configuration: RWD, 4WD
- Fuel
- Varies by configuration: Hybrid, Gasoline, Flex fuel
- Seating
- Not available
Key Performance & Dimensions
Engine
| Specification | Value | Source |
|---|---|---|
| Engine | Varies by configuration: 6.0L 8-cylinder, 4.3L 6-cylinder, 4.8L 8-cylinder (FFV), 5.3L 8-cylinder (FFV), 6.2L 8-cylinder (FFV) | |
| Displacement | 4.3 L to 6.2 L | |
| Cylinders | 6 to 8 | |
| Fuel type | Varies by configuration: Hybrid, Gasoline, Flex fuel | EPA fueleconomy.gov |
Not available from our sources: Aspiration, Power, Torque.
Transmission and drivetrain
| Specification | Value | Source |
|---|---|---|
| Transmission | Automatic | EPA fueleconomy.gov |
| Gears | 4 to 6 | |
| Drivetrain | Varies by configuration: RWD, 4WD |
Fuel economy and range
| Specification | Value | Source |
|---|---|---|
| Combined | 21 mpg (11.2 L/100 km) to 14 mpg (16.8 L/100 km) | EPA fueleconomy.gov |
| City | 20 mpg (11.8 L/100 km) to 12 mpg (19.6 L/100 km) | |
| Highway | 23 mpg (10.2 L/100 km) to 18 mpg (13.1 L/100 km) |
Not available from our sources: Electric range, Battery capacity.
Trims and configurations
12 configurations listed by our sources. Engines, drivetrains and fuel economy can differ between them.
- Sierra 15 Hybrid 2WD · 6.0L · RWD · automatic · Hybrid
- Sierra 15 Hybrid 4WD · 6.0L · 4WD · automatic · Hybrid
- Sierra C15 2WD · 4.3L · RWD · 4-speed automatic
- Sierra C15 2WD · 4.8L · RWD · 4-speed automatic · FFV
- Sierra C15 2WD · 5.3L · RWD · 6-speed automatic · FFV
- Sierra C15 2WD · 6.2L · RWD · 6-speed automatic · FFV
- Sierra C15 XFE 2WD · 5.3L · RWD · 6-speed automatic · FFV
- Sierra K15 4WD · 4.3L · 4WD · 4-speed automatic
- Sierra K15 4WD · 4.8L · 4WD · 4-speed automatic · FFV
- Sierra K15 4WD · 5.3L · 4WD · 6-speed automatic · FFV
- Sierra K15 4WD · 6.2L · 4WD · 6-speed automatic · FFV
- Sierra K15 AWD · 6.2L · 4WD · 6-speed automatic · FFV
Recalls
NHTSA lists 2 recall campaigns for this model year. Last checked October 14, 2026.
14V827000: ELECTRICAL SYSTEM:IGNITION
General Motors LLC (GM) is recalling certain model year 2011-2012 Cadillac Escalade, Escalade ESV, Escalade EXT, Chevrolet Avalanche, Silverado HD, Silverado LD, Suburban, Tahoe, GMC Sierra LD, Sierra HD, Yukon, and Yukon XL vehicles. In the affected vehicles, the ignition lock actuator may bind, making turning the key difficult or causing the ignition to get stuck in the "Start" position.
Remedy: GM will notify owners, and dealers will inspect and replace the ignition lock housing, as necessary, free of charge. The recall began on February 12, 2015. Owners may contact GM customer service at 1-800-458-8006 (Cadillac),…
Reported December 30, 2014. View on NHTSA
13V615000: FUEL SYSTEM, DIESEL
General Motors LLC (GM) is recalling certain model year 2012-2013 Chevrolet Silverado HD and GMC Sierra HD vehicles, equipped with 6.6L diesel engines and dual fuel tanks. In the affected vehicles, the transfer pump which moves fuel from the rear tank to the front tank could malfunction and cause the fuel gauge to indicate an inaccurate reading.
Remedy: General Motors will notify owners and dealers will inspect and replace the fuel transfer pump, as necessary, free of charge. The manufacturer has not yet provided a notification schedule. The recall began on May 30, 2014. Owners may…
Reported December 11, 2013. View on NHTSA
Data sources
- EPA fueleconomy.gov · retrieved October 14, 2026 · US Government public data
- NHTSA vPIC · retrieved October 14, 2026 · US Government public data
Source checked: October 14, 2026
Data verified: October 14, 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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Related vehicles
- 2011 GMC Sierra
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21 mpg (11.2 L/100 km) to 14 mpg (16.8 L/100 km) - 2013 GMC Sierra
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21 mpg (11.2 L/100 km) to 16 mpg (14.7 L/100 km) - 2012 Chevrolet Silverado
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21 mpg (11.2 L/100 km) to 14 mpg (16.8 L/100 km)
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Frequently asked questions
What engine does the 2012 GMC Sierra have?
Varies by configuration: 6.0L 8-cylinder, 4.3L 6-cylinder, 4.8L 8-cylinder (FFV), 5.3L 8-cylinder (FFV), 6.2L 8-cylinder (FFV). Engines can differ by trim, so check the trim list below.
What is the fuel economy of the 2012 GMC Sierra?
Combined fuel economy is 21 mpg (11.2 L/100 km) to 14 mpg (16.8 L/100 km), as published by the source shown in the specification table.
Is the 2012 GMC Sierra front-wheel, rear-wheel or all-wheel drive?
Drivetrain: Varies by configuration: RWD, 4WD.
Are there recalls for the 2012 GMC Sierra?
NHTSA lists 2 recall campaigns for this model year (last checked October 14, 2026). Details are in the Recalls section.