GMC Launches 2015 Sierra All Terrain HD

The 2015 GMC Sierra 2500 HD and 3500 HD trucks are usually found working hard at construction sites, but GMC sales and marketing vice president Duncan Aldred says a new version introduced today is, "equally comfortable whether it's a night on the town or traversing a remote job site." Called the All Terrain HD, the new variant of the heavy-duty Sierras debuts this summer.

The 2015 GMC Sierra All Terrain HD draws inspiration from a concept of the same name shown at the 2011 Detroit auto show. It's a toughened truck more ready for off-road use, yet it also has several high-end luxury touches. Based on today's 2015 GMC Sierra HD SLE or SLT trim levels, with double or crew cabs, the modern All Terrain HD packs either a 6.0-liter V-8 rated for 360 hp, or a 6.6-liter turbodiesel V-8 good for 397 hp and 765 lb-ft of torque. Four-wheel-drive comes standard, along with the Z71 Off Road package that bundles Rancho twin-tube shock absorbers, hill descent control, and a skid plate.

Visual separation from other 2015 GMC Sierra HD trucks comes courtesy of a chrome-trimmed grille, unique 18-inch wheel (with 20-inchers optional), new aluminum skid plates, chrome mirrors, chrome moldings, and a chrome lower front bumper. As for the cabin, the All Terrain HD benefits from a standard backup camera, branded doorsill plates, carbon-fiber trim, and a prominent All Terrain logo in the instrument cluster.

Aside from the addition of the All Terrain, all versions of the 2015 GMC Sierra 2500 HD and 3500 HD benefit from a handful of equipment changes for the new model year. The cruise control is now integrated with the auto grade braking and diesel exhaust braking systems, frontal airflow has been revised to send more cooling air to the engines, new brake rotors are claimed to last twice as long as before, and there are new heated, powered trailering mirrors available on SLE, SLT, and All-Terrain models.

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