GM reveals GMC Sierra All Terrain HD concept prior to 2011 NAIAS
One look at the photo provided by media.gm.com and you immediately see it is highlighted by a bold exterior design, enhanced all-terrain suspension and premium details expected of a GMC – all designed to enable greater access to off-road destinations. Moreover, large fender flares stretch away from the body to cover the 35-inch-tall BFGoodrich tires.
According to the release, the new 2011 Sierra HD underpins the All Terrain HD concept, with a modified, production-based 4WD chassis and the Duramax diesel/Allison 1000 six-speed powertrain. The enhanced suspension and unique body dimensions, including increased ground clearance and wider track, as well as greater approach/departure angles, deliver off-road capability while maintaining HD levels of payload and trailering capacity.