Crash Test Rating
Source   NHTSA
MPG (up to)
City / HWY
Horsepower
335 -397
Seats
2 -6
Front passenger 3/4 w/ wheels turned.

Positive Owner Reviews

accountCircle KENNY R
Great towing capabilities in a truck loaded with features!
Love my 2012 GMC 2500HD Denali. Has about every feature I could want, plus great towing power. Pretty comfortable ride for a heavy duty truck. Wish I had the diesel engine, more back seat room, and rear air vents.
accountCircle James G
It's a diesel truck. It rides like an expensive car.
I like diesel and 4wd along with crew cab.
accountCircle Leanne M
GMC 2500 best truck I have ever owned.
I have had this particular vehicle for about 3 years and I have had no problems with it at all besides changing a headlight every now and then. It has 120 + thousands miles on it and runs great. It is spacious enough for my family and dogs. Handles great, does good in the snow. Absolutely no complaints about it.
accountCircle Rachel E
Heavy duty truck that is safe for the family.
It is reliable and high performance. I use it to haul horses regularly and I'm Does the job effortlessly. It has plenty of room with a crew cab. It can fit 5 people comfortably inside. Has fake leather seats and they are very comfortable and easy to clean. I have a young child that spills and throws snacks regularly and the seats clean up like nothing. The truck has all the standard features and tow and haul package. The only issue with a faulty fuel injector that had to be replaced and was a big expense. This was a major problem but every other feature of the vehicle is wonderful. Even the gas mileage is not terrible for it being a large diesel truck that is also hauling all the time.
accountCircle Serena H
Overall great working truck.
Bought in 2013 it is been 7 years and so far no major issues. Windows do not roll down from time to time or will get stuck mid-way, but that is about it. Use it to tow 30 ft boat frequently(about once or twice a week). Very reliable work truck, front seats are pretty spacious and comfortable.
accountCircle Kevin H
Nice truck, but little issues are annoying.
Really enjoy my 2012 GMC sierra. I am the second owner. I have had no major issues so far. One thing that I have had to have addressed multiple times is the tailgate. Two times the internal mechanism has rotted out. Also, it is impossible to change a headlight bulb on your own. Costs me about $100 each time I need it changed. Very upsetting.

GMC Sierra 2500HD Models

Models also known as Trim Levels, are used to identify a vehicle's level of equipment or special features.

car
Work Truck
335-397 HP 2-6 Seats
car
SLE
335-397 HP 2-6 Seats
car
SLT
335-397 HP 5 Seats
car
Denali
360-397 HP 2-6 Seats
Photos may not match model

2012 GMC Sierra 2500HD Owner Reviews

4.67
6 Reviews
close Write Review
5 stars 67%
4 stars 33%
3 stars 0%
2 stars 0%
1 star 0%
accountCircle James G on October 9, 2020
It's a diesel truck. It rides like an expensive car.
I like diesel and 4wd along with crew cab.
accountCircle KENNY R on March 31, 2020
Great towing capabilities in a truck loaded with features!
Love my 2012 GMC 2500HD Denali. Has about every feature I could want, plus great towing power. Pretty comfortable ride for a heavy duty truck. Wish I had the diesel engine, more back seat room, and rear air vents.

Ranks #3 Full Size Pickup Trucks by Owners

The 2012 GMC Sierra 2500HD has an average owner rating of 4.67 out of 5 which ranks it #3 of 15 other Full Size Pickup Trucks.

1
car
5
2
car
4.68
3
car
4.67

Is The 2012 GMC Sierra 2500HD A Good Car?

Very reliable.. Constructed with odd quirks though.. Like how getting a battery out works.. Not very well and position of the glow plugs.
Shane T.

How Reliable Is The 2012 GMC Sierra 2500HD?

Very reliable. Especially the fuel filters. Def system does bog down the truck and cause a lot of errors.
Shane T.

Is The 2012 GMC Sierra 2500HD A Good Value?

45k the truck is now several years old.. Still drives like new... Though with a lot of dog hair problems that are besides the point.
Shane T.

Related Articles for 2012 GMC Sierra 2500HD

From the Vehicle History blog

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GMC Airbag Recalls: Worth Your Worry?

Safety & Reliability

NHTSA Logo
NHTSA Crash Test

Overall

Front

Rollover

Side

*National Highway Traffic Safety Administration
IIHS Logo
IIHS Crash Test
(Not Tested)
*Insurance Institute for Highway Safety