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2011 NAIAS: GMC Sierra All Terrain HD Concept

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General Motors finally took the wraps of the new GMC Sierra All Terrain HD Concept, unveiled through a set of studio images a few days ago, showing a combination between heavy-duty truck capability and off-road versatility.

Boasting a modified, production-based 4WD chassis and the Duramax diesel/Allison 1000 six-speed powertrain, the vehicle also benefits from enhanced suspension, increased ground clearance and wider track, while maintaining HD levels of payload and trailering capacity.

Specifically, power comes from a 6.6-liter Duramax diesel V8 that delivers 397 horsepower and 765 pound-feet (1037 Nm) of torque from the engine to all four wheels. The vehicle rides on 20-inch aluminum wheels wrapped in 35-inch BFGoodrich KM2 mud terrain tires.

Other highlights include a unique five-foot, eight-inch Crew Cab/short box body configuration that supports a wheels-at-the-corners proportion.

The All Terrain HD is painted Iridium Metallic - “a dark charcoal color that reveals a reddish, anodized inflection when viewed from certain angles. It complements other anodized and satin-metal finishes on the exterior, which give the truck a more precise and functional appearance,” as the carmaker says.

Inside features include two-tone dark gray leather seats with red contrast stitching and embossed carbon fiber-style leather on the seating surfaces. The steering wheel, instrument panel and center console are wrapped in leather.

A new navigation radio previews future radios to be offered in GMC vehicles. Thanks to an integrated 80Gb hard drive that contains map data for the navigation system, it eliminates the need for a map disc and provides greater storage of music from portable devices.

"The design of the All Terrain HD is an expression of its capabilities – strong, functional and absolutely professional grade," said Carl Zipfel, design manager. "We're excited about the design elements and exploring how they could apply to future GMCs."
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