Recently freshened, the HD Sierras (and its Silverado twin) are designed for heavy towing and hauling, and ride stiffer than the Sierra 1500. The standard engine is a 6.0-liter V8. The 397-hp, 6.6-liter turbodiesel produced a whopping 765 foot-pounds of torque and could haul close to a 2,500-pound payload. The diesel is punchy but noisy, and the Allison-made six-speed automatic is smooth.
There are 3 recalls on this vehicle. Learn More.

Overall Owner Satisfaction

Consumer Reports’ Annual Owner Satisfaction Survey can improve the chances of finding a compatible car match. How? Our survey data reveals whether, all things considered, owners would buy the same car again. The answer to that question is what determines our owner-satisfaction rating, which is a powerful piece of intel because it predicts how well a particular model will satisfy other owners.

Overall Owner Satisfaction

Owner Satisfaction with:

Driving Experience

Includes acceleration and handling

What Owners Say

"terrible gas mileage but able to get off road in comfort"

Kathy B., BC (2012 GMC Sierra 2500HD)

"The ride in this vehicle is very comfortable. It's long wheel base reduces the shock of the road."

Jerry C., IA (2012 GMC Sierra 2500HD)

"The acceleration, off the line and at speed, is exceptional. This truck has no problem getting out of its own way and getting you into traffic."

Anonymous, VA (2012 GMC Sierra 2500HD)

"Great performance, good gas mileage when empty"

Anonymous, CO (2012 GMC Sierra 2500HD)

"Strong acceleration towing heavy loads"

Paul E., OH (2012 GMC Sierra 2500HD)

"Powerful and tough"

Richard A., VT (2012 GMC Sierra 2500HD)

"I've had several General Motors pickups and this far outshines them all. Power, acceleration, handling are amazing. Everyone comments on the looks of the truck. It has been a great investment."

Anonymous, ME (2012 GMC Sierra 2500HD)


Includes seats, climate control, noise, and ride

What Owners Say

"It provides a smooth quiet ride considering it’s a 3/4 Tom truck."

Anonymous, ID (2012 GMC Sierra 2500HD)

"Great adjustable support, good and firm"

Anonymous, CO (2012 GMC Sierra 2500HD)

"Only issue I have had is wind noise/crackling from the front passenger A pillar. This was also present with my older 2002 Silverado truck."

Anonymous, SK (2012 GMC Sierra 2500HD)

"It's a living room on wheels"

Richard A., VT (2012 GMC Sierra 2500HD)


Did you get what you wanted relative to the price you paid?

What Owners Say


Robert B., CA (2012 GMC Sierra 2500HD)
No Data Available

Would you buy this car again?

2012 vehicles
Chevrolet Silverado 1500
Chevrolet Silverado 2500HD
Dodge Ram 1500
Dodge Ram 2500
Dodge Ram 3500
Ford F-150
Ford F-250
Ford F-350
GMC Sierra 1500
GMC Sierra 2500HD
Ram 1500
Ram 2500
Ram 3500
Toyota Tundra
Percentage of owners who would definitely purchase that same vehicle again. Owner-satisfaction Ratings are determined by the percentage of those who answered "definitely yes" to the question asked by the Consumer Reports Annual Auto Survey "Considering all factors (price, performance, reliability, comfort, enjoyment, etc.), would you get this car if you had to do it all over again?". If we don’t have sufficient data, a similar model might be used to form the owner-satisfaction score.
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