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2015 GMC Sierra 2500HD

Motor Trend logo Motor Trend 8/27/2014 Christian Seabaugh

Vehicle Overview

The 2015 GMC Sierra HD gets a major update this year. Though the Sierra remains unchanged under the skin, the 2015 Sierra HD benefits from the same exterior and interior changes as its light-duty sibling, the 2014 GMC Sierra 1500. The new Sierra HD gets a big, bold new grille, sharper bodywork, and a nicer interior than ever before. Under the skin, the Sierra remains largely unchanged with a fully boxed ladder frame and two carryover engines. The 2015 Sierra's base engine is a gas 6.0-liter V-8 making 360 hp and 380 lb-ft of torque. Optional is a Duramax 6.7-liter, turbodiesel V-8 making 397 hp and 765 lb-ft of torque. Both V-8s are backed up by a six-speed automatic. Rear drive is standard and four-wheel drive is optional. Sierra 2500 models come with single rear wheels, while Sierra 3500s have an optional dual-rear-wheel setup.

We had a chance to sample a 2015 GMC Sierra Denali 2500 with the turbodiesel engine and we found it to be a big improvement over the previous-generation truck. "We first drove the Denali unloaded. The Duramax continues to be an excellent engine, quickly pulling the truck to speed from a stop and doing it fairly quietly. Even with the quieter cab making everything easier to hear, the turbos and exhaust brake aren't noisy. … The ride was better than we expected."

The 2015 GMC Sierra HD remains one of the most capable trucks in the segment, and the truck of choice for those looking for upscale touches. The GMC Sierra Denali gets a quieter cabin with soft-touch plastics, supple leather, and a unique instrument panel. The Denali also sports an in-your-face chrome grille unavailable on the rest of the Sierra HD lineup.

New for 2015

The 2015 GMC Sierra HD is new this year. The Sierra HD gets new exterior and interior styling, and new features such as an integrated rear step in the rear bumper, a soft-opening tailgate, and GMC's latest infotainment system.

You'll Like

  • Upscale Denali trim
  • 765 lb-ft of torque
  • Integrated rear-bumper step

You Won't Like

  • The Sierra can get up there in price

Key Competitors

  • Chevrolet Silverado HD
  • Ford F-Series Super Duty
  • Ram HD

Sum Up

3 star The Big Hauler


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