Crash Test
Not Tested
Source NHTSA
MPG (up to)
City / HWY
Horsepower
322 -397
Seats
5 -6
Front passenger 3/4 w/ wheels turned.

Positive Owner Reviews

accountCircle Josh T
Beautiful white color with tan interior! Silver detailing around the car.
I've had problems with the engine light. Minor. Not a big deal. Very smooth drive! Great gas mileage on highways! Great for hauling cattle around. Easy to go hunting in. Only got stuck a few times. All and all it is a fantastic car. I am hoping to purchase a new one with a good scoop in the near future.
accountCircle Louise R
Truck has a lot of space and seating is nice with 2 in the front and 2 in back.
It is a great truck. GMC vehicles have a clicking noise when switching gears while driving slow. It is common in all GMC trucks so something you have to just deal with. That is the only real issue I have with the truck. There is a lot of availability to upgrade the truck and personalize it.
accountCircle Rodney H
That it has the best tow rating of any other truck on the market. You do not need any upgrades to make it possible that others have to have. You can fit 6 people and tow anything in the back or on the back while you do it.
It is a great and dependable vehicle with some of the safest options there are. I can hook it up to anything and tow it without worries., I can haul as many people as needed to any destination they want to go
accountCircle A W
I love my truck I wouldn't trade it for another one.
My vehicle is 5 years old I have had problems in the past with it like the batteries were bad and it wouldn't start without being jump started but after both batteries were replaced it runs just fine I replaced all tires on my truck last week because I got a nail in one of my tires so I just went ahead and replaced all tires because they needed to be anyway. Other than that there is not anything wrong with it I love it.
accountCircle Derek B
The increases expense of maintaining a diesel vehicle over gas
Love driving it everyday, have over 50 thousand miles on it and have had no major issues. Would buy another
accountCircle Robert E
Lots of power.for pulling heavy loads and is still very comfortable.
I bought it to pull a 5th wheel trailer. It has a lot of power. It has very nice creature comforts.
accountCircle Joe B
The truck you have to have for towing.
The 2015 gmc 3500 hd denali not only has good looks inside and out, it is a very comfortable truck to drive. The only drawback is the wide rear end. Something you get use to. The truck has a great towing ability. The heavier it is the smoother the ride. This truck you will have a long time due to the diesel engine. You won't be disappointed.
accountCircle Cat T
Great work truck for hauling and towing.
Reliable vehicle, tows heavy loads, runs great, has many extra features like heated seats and steering wheel, great sound, room for the family, great for hauling large items, comfortable to drive, lots of room, good gas mileage, not the most convenient to drive around town because of size.

GMC Sierra 3500HD Models

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

car
Base
322-397 HP 5-6 Seats
car
SLE
322-397 HP 5-6 Seats
car
SLT
322-397 HP 5 Seats
car
Denali
322-397 HP 5 Seats
Photos may not match model

2015 GMC Sierra 3500HD Owner Reviews

4.62
13 Reviews
close Write Review
5 stars 62%
4 stars 38%
3 stars 0%
2 stars 0%
1 star 0%
accountCircle John on May 25, 2021
Great Diesel Tow Vehicle
Really love the GMC Duramax as a tow vehicle with 11,000lb fifth wheel on back. We hardly know we are trailering and the exhaust brake is a dream. Done several trips from BC to Mexico and SoCal and not a problem. Second GMC Duramax owned. Would buy again.
accountCircle A W on January 23, 2021
I love my truck I wouldn't trade it for another one.
My vehicle is 5 years old I have had problems in the past with it like the batteries were bad and it wouldn't start without being jump started but after both batteries were replaced it runs just fine I replaced all tires on my truck last week because I got a nail in one of my tires so I just went ahead and replaced all tires because they needed to be anyway. Other than that there is not anything wrong with it I love it.

Ranks #7 Full Size Pickup Trucks by Owners

The 2015 GMC Sierra 3500HD has an average owner rating of 4.64 out of 5 which ranks it #7 of 14 other Full Size Pickup Trucks.

1
car
4.81
2
car
4.75
7
car
4.62

Safety & Reliability

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