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2015 GMC Sierra 3500 HD Regular Cab KBB Expert Review

The Fair Market Range for this car in your area is $34,866 - $35,741.

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What Others Paid
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MSRP $37,110

Fair Purchase Price $35,258
Fair Market Range ($34,866 - $35,741)

Invoice $34,949
"What Others Paid" is based on the last 90 days within the U.S.

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Consumer Rating 8.3 / 10
10/8.3

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KBB Expert Review

Vehicle Details Interior  Dashboard, center console, gear shifter view photo

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   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 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.

Notable 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

A 6.0-liter V8 gasoline engine or a 6.6-liter Duramax turbodiesel V8 engine provide power to the 2015 GMC Sierra HD. Rated at 360 horsepower and 397 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 380 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 V8
360 horsepower @ 5,400
397 lb-ft of torque @ 3,000
EPA city/highway fuel economy: NA

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

Pricing Notes

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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