2011 Detroit: GMC Sierra All-Terrain HD Concept is an off-roading monster

2011 Detroit: GMC Sierra All-Terrain HD Concept

One of the many cars revealed by the General at the 2011 North American Auto Show was the GMC Sierra All-Terrain HD Concept. Assuming that it is specifically designed to combat Ford’s F150 SVT Raptor, the HD Concept is GM’s study effort of combining the heavy-duty truck capability of GMT900 platform with greater off-road versatility.

Click here for our original post on the GMC Sierra All-Terrian HD Concept.

Visually, the HD is a very aggressive truck, just like the Raptor and reminisces on the days when GM owned Hummer.

Power as you would think comes from a massive 6.6L Duramax turbodiesel, which punches out 397hp and a whopping 765 lb-ft or 1037 Nm of torque. And to put that into perspective, the Bugatti Veyron 16.4 churns out 922 lb-ft or 1,250 Nm of torque. Paired with an Allison 1000 six-speed auto, the HD Concept boasts a tow rating of 15,600 lbs.

To make the new HD more off-road capable, it features a five-foot, eight-inch Crew Cab/short box configuration to allow the wheels to sit as far into the corners of the truck as possible for the best approach and departure angles. Overall length is slightly shorter than current Sierra HD models. The suspension has been fully upgraded with a 3-inch lift, custom front upper and lower control arms, front and rear jounce shocks, an electronic front stabilizer bar and massive 35-inch BFGoodrich mud tires.

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Check out the live high-res gallery after the jump.

2011 Detroit: GMC Sierra All-Terrain HD Concept:

2011 GMC Sierra All Terrain HD Concept:

– By: Chris Chin