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2015 GMC Sierra 3500 HD Crew Cab

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2015 GMC Sierra 3500 HD Crew Cab Expert Review

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When you need a full-size truck to haul heavy objects, the muscle provided by the 2015 GMC Sierra HD will be more than sufficient. Like the 2015 Chevrolet Silverado 2500 and 3500 HD, the Sierra HD is General Motors' other answer the Ford F-Series and Ram HD trucks. Both the Sierra 2500 and 3500 HD offer you the choice of a 6.0-liter V8 gasoline engine or a 6.6-liter Duramax turbodiesel V8, as well as rear-wheel-drive and 4-wheel-drive configurations. The choices go on from different cab configurations and bed lengths to trim levels. Even though it's not the best heavy-duty truck in its class, the Sierra HD offers plenty of muscle to get the job done.

You'll Like This Car If...

This truck was built to help you tow heavy things on a daily basis, whether it's short or long distances. Whatever the job calls for, the 2015 GMC Sierra will get it done.

You May Not Like This Car If...

There's not a whole lot of daylight between the Sierra and its more mainstream heavy-duty truck cousin, the Silverado. Like the Silverado, the Sierra HD doesn't lead the class in towing numbers, either.

How It Ranks

#27

out of 56

Horsepower

#40

out of 53

Consumer Ratings
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Consumer Rating

8.4 out of 10
View all
consumer ratings
2015 GMC Sierra 3500 HD Crew Cab Low/wide front photo What's New for 2015

Both the interior and exterior have been redesigned to match that of the Sierra light-duty full-size truck launched last year. The CornerStep bumper and LED taillights in the bed also join the fray.

Driving the Sierra 3500 HD Crew Cab
2015 GMC Sierra 3500 HD Crew Cab Front angle view photo

Driving Impressions When we spent some time with the 2015 Sierra HD, the drive route consisted mostly of long highway stretches and the miles slipped by thanks to the spacious cabin and...

... a drivetrain that did its part to keep quiet. After a few hours of seat time with and without a trailer in tow, we never felt worse for wear. After we had our fill of towing everyday things like the fifth wheel, we hooked up to a trailer carrying 10,000 pounds and drove GMC's heavy-duty truck up and down a steep grade, rising as high as 5,000 feet above sea level at one point. The full-size Sierra HD demonstrated that it can control just about anything you'll ever need to tow. Each trailer had minimal wag, and the 6-speed Allison automatic transmission (paired with the Duramax) working in conjunction with an exhaust brake kept everything under control going downhill.

INTERIOR
An all-new upright instrument cluster features six gauges and a slew of large, easy-to-use rubberized knobs responsible for various things like climate control and radio volume. Ambient lighting illuminates all of the vital switches in the cabin, making each easier to locate when driving at night.

6.6-LITER DURAMAX ENGINE
Paired with a 6-speed Allison automatic transmission, the Duramax turbodiesel engine runs strong and quiet, all while providing power on demand in an even fashion.

2015 GMC Sierra 3500 HD Crew Cab Details
2015 GMC Sierra 3500 HD Crew Cab Dashboard, center console, gear shifter view photo Interior

Major restyling points go to the 2015 GMC Sierra HD interior, and it was achingly overdue. The base model brings basic amenities like a front split-bench seat, air conditioning, and power windows and locks. Move up to the SLE and you'll get features like a leather steering wheel and rubberized vinyl floor mats. The top-tier SLT trim offers everything mentioned plus dual-zone climate control, a high-capacity air cleaner, and a suspension package. Then there's the Denali trim, which is GMC's halo trim across the board. It brings things like contrast stitching, perforated leather seats, and aluminum trim on the instrument panel.

Exterior
2015 GMC Sierra 3500 HD Crew Cab photo

Besides the interior, the Sierra HD's exterior styling is a major change for the 2015 model year. Like the interior, the exterior styling of the Sierra HD now more closely reflects that of its light-duty offering. Headlights with LED running lights, a more prominent grille (a common theme in the pickup truck segment, lately), CornerStep rear bumper, and a raised power-dome hood are some noticeable new additions when just looking at the Sierra HD. The same two models, the 2500 and 3500 heavy-duty, are still offered.

Notable Equipment
Standard Equipment

With the base Sierra HD truck, you get a robust V8 engine, antilock disc brakes, air conditioning, and stability control. An automatic locking rear differential is also standard on all Sierra HD trucks with the exception of the 2500 HD base model. Climbing up the trim ladder brings you leather seats, steering-wheel-mounted controls, and Bluetooth. Both Sierra 2500 and 3500 HD models equipped with a Duramax engine also get an all-new electric assist heater, which helps to warm the cabin quickly.

Optional Equipment

The 6.6-liter V8 Duramax turbodiesel engine is, without question, the option to get when outfitting your 2015 Sierra 2500 or 3500 HD. Going with the Duramax engine and 4-wheel drive will save you some major headaches in the future. Other notable options for the 2500 and 3500 truck include a touch-screen navigation system, an EZ-Lift tailgate, and a snow-plow prep package.

Under the Hood
2015 GMC Sierra 3500 HD Crew Cab Engine photo

A 6.0-liter V8 gasoline engine or a 6.6-liter Duramax turbodiesel V8 engine provide power to the 2015 GMC Sierra HD. A 6.0-liter V8 powered by compressed natural gas (CNG) is also available, if that's how you roll. Rated at 360 horsepower and 380 lb-ft of torque, the gasoline engine is stout in its own right, but the Duramax diesel is the real star of the show. Power numbers for the 6.6-liter Duramax turbodiesel V8 check in at 397 horsepower and 765 lb-ft of twist. The Duramax engine also brings an exhaust braking system that helps keep the Sierra HD's speed in check going downhill. A 6-speed automatic transmission reports for duty with either engine, but the Duramax gets the added shift-technology benefits of an Allison 6-speed automatic.

6.0-liter CNG V8
301 horsepower @ 5,000
333 lb-ft of torque @ 4,200
EPA city/highway fuel economy: NA

6.0-liter V8
360 horsepower @ 3,000
380 lb-ft of torque @ 4,200
EPA city/highway fuel economy: NA

6.6-liter turbodiesel V8
397 horsepower @ 4,200 rpm
765 lb-ft of torque @ 1,600 rpm
EPA city/highway fuel economy: NA

If you just want to get into a 2015 GMC Sierra HD, you can do so by spending as little as $35,740. At the other end of the spectrum, if you're looking to drop some serious coin, go with a Sierra Denali 3500 HD crew cab, long box. You won't have any issues clearing the $65,000 mark that way. That number may bring a little sticker shock at first, but it does fall in line with the most plush full-size truck offerings from Ford and Ram. Before buying, be sure to check the Kelley Blue Book Fair Purchase Price to see what others in your area are paying for a 2015 Sierra HD. The resale value of the Sierra HD is also in line with the competition, but opting to go with the Duramax diesel engine will help keep the resale value up.

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2015 GMC Sierra 3500 Consumer Reviews

Overall Rating
8.4
Out of 10

Based on 48 Ratings for the 2014 - 2015 models.

Review this car
  • Value
    8.3/10
    Quality
    8.7/10
  • Reliability
    9.0/10
    Performance
    8.5/10
  • Comfort
    9.1/10
    Styling
    9.0/10

2015 Gmc Sierra Denali 6.2

By on Tuesday, January 26, 2016

I own this car - My approximate mileage is 9,300

10 2.0
overall rating 2 of 10rating details

Reviewer Ratings

Overall Rating
2/10
Value
5/10
Reliability
6/10
Quality
2/10
Performance
1/10
Styling
10/10
Comfort
10/10

Pros: "love the body and"

Cons: "transmission is horible"

Likely to recommend this car? (1-10): 1

"I love the body and interior of the truck but the transmission has given me lots of problems it shakes and the transmission feels like its going to fall at least 4 times a day when it shifts. I have been to the service department 3 times once they kept it for 2 months. I'm going to bring it back this week and I have not towed nothing yet. I'm a conservative drive. I paid 58k"

it is okay-could be a lot better

By on Tuesday, October 13, 2015

I own this car - My approximate mileage is 2,200

10 6.0
overall rating 6 of 10rating details

Reviewer Ratings

Overall Rating
6/10
Value
7/10
Reliability
10/10
Quality
8/10
Performance
5/10
Styling
6/10
Comfort
6/10

Pros: "exterior looks great, leather seats high quality"

Cons: "cooled seats barely work, mileage"

Likely to recommend this car? (1-10): 4

"I looked for a truck for a few months. Drove all of them: Ford, Dodge Chevy and General Motors I went with the Sierra over the Dodge even though the Dodge is better looking, has better navigation and electronics not to mention the ram box built in storage in the bed which is amazing. I cannot believe other trucks do not have something similar. But, could not get over the unreliability of Dodge in the past. I sold a 2009 Sierra Hybrid with 100000 miles on it with major problems with the hybrid system so I wanted to go with a regular gas truck. The Sierra looks really nice on the exterior and interior but it lacks far behind the Dodge in comparison. I bought it with pretty much every option it could have such as sunroof, navigation, driver alert package, cooled and heated seats, Z-71 package, 20 inch wheels etc. The drive is nice but not as quiet as I have read and heard about. The headlights are horrible. I have to constantly turn on the high beams to see on dark roads even while going slow. Hopefully there will be an update or upgrade to the head lights I could get. The back up camera lacks the clarity and resolution of the other brands. Now lets discuss the abysmal fuel economy in the city with the 5.3 engine with 4 x 4. averaging around 14 in town. Does much better on the freeway with cruise control on-average 18-20 and I am very light on the accelerator. The voice activated commands for the navigation never understand me and I speak perfect English with a loud voice. The acceleration of the truck is very sluggish, almost as though I have to push the gas pedal very hard and there is a hesitation before it will go. I hope I am just not used to it and it will improve over time. I am hoping I will learn to like the truck better over time as I have only 2200 miles now and I am having serious buyer remorse. I have not had the opportunity to use the 4 x 4 yet but I hope it is as good as some other folks commented on. The system has a hesitation when changing radio channels and the back up camera takes a second or two to cancel once it is put into drive again so as I am driving forward after backing up the rear view is still on the navigation screen for a little bit-kind of annoying."

37 people out of 71 found this review helpful

I LOVE THIS TRUCK

By on Wednesday, October 07, 2015

I own this car - My approximate mileage is 9,300

10 9.0
overall rating 9 of 10rating details

Reviewer Ratings

Overall Rating
9/10
Value
8/10
Reliability
10/10
Quality
10/10
Performance
9/10
Styling
10/10
Comfort
10/10

Pros: "GREAT OVERALL TRUCK"

Cons: "A CHALLANGE TO PARK IN CROWDED LOTS."

Likely to recommend this car? (1-10): 10

"I HAVE A 2014 SLE 4 WHEEL DRIVE DOUBLE CAB. I HAVE OWNED IT FOR 2 YEARS. IT IS THE BEST TRUCK I HAVE EVER OWNED & I HAVE HAD SEVERAL. FORDS , DODGES & GMC'S. I REALLY ENJOY DRIVING IT. IT HANDELS VERY WELL & IS QUIET & POWERFUL WITH THE 5.3 V-8. I HIGHLY RECCOMEND THIS TRUCK."

12 people out of 16 found this review helpful

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