2011 GMC Sierra All Terrain HD Concept

GMC Sierra All Terrain HD Concept Takes Heavy-Duty Capability To New Ground.
DETROIT - The GMC Sierra All Terrain HD concept is an exploration of heavy-duty truck capability combined with greater off-road versatility. 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.
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.
"The Sierra All Terrain HD concept takes GMC's outstanding new HD platform to the next level, marries it to the legendary Duramax diesel/Allison transmission, and provides a heavy-duty expression of GMC's premium All Terrain package," said Lisa Hutchinson, GMC product marketing director. "It delivers the exceptional capabilities of the Sierra HD - hauling, towing and performance - and applies them to the toughest driving environments. It's the ultimate professional-grade tool for construction crews, ranchers and adventurers whose activities aren't limited by where the pavement ends."
The Sierra All Terrain HD features a unique five-foot, eight-inch Crew Cab/short box body configuration that supports a wheels-at-the-corners proportion. Shorter in overall length than production Sierra HD models, the concept's dimensions contribute to greater approach/departure angles. Additional off-road elements include:
Wider, 73-inch (1,853 mm) track for greater stability
Approximately 3 inches (76 mm) greater ground clearance
Custom front upper and lower control arms
Specially constructed Fox off-road shocks with remote fluid reservoirs (integrated in the wheel house liners)
Front and rear jounce shocks
Electronic front stabilizer bar disconnection
35-inch-tall BFGoodrich KM2 "mud terrain" tires mounted on 20-inch machined aluminum wheels
Full composite underbody protection.


If you think the Ford F-150 SVT Raptor is too hot yet the Dodge Ram Power Wagon is too cold, General Motors' latest concept might strike you as "just right." This, the GMC Sierra All Terrain HD concept, looks to bridge the gap between the two hardcore pickups from GM's crosstown rivals, while still offering top-notch levels of power, refinement and technology.
The four-door 2011 Sierra HD underpins the All Terrain concept, and power comes from The General's 6.6-liter Duramax diesel V8. A six-speed automatic sends the 397 horsepower and 765 pound-feet of torque to all four wheels. Versus a normal Sierra HD, ground clearance has been increased by about three inches, width has been bumped up to 73 inches (four more than normal) and the whole package rides on 20-inch aluminum wheels wrapped in 35-inch BFGoodrich KM2 mud terrain tires. Off-road performance is enhanced with the addition of Fox off-road shocks (just like the Ford Raptor).
Inside, GM has fitted the All Terrain concept with a Denali-spec interior with additional satin metal finishes and a leather-wrapped dash. What's more, a next-generation stereo system with an 80-gigabyte hard drive has been fitted inside this concept, and we'll soon be seeing this new system across the full GM product range.
Currently, there are no plans to create a production version of the All Terrain concept, though GM tells us that if a road-ready version of this ultra-tough Sierra is produced, it will likely be crafted with the assistance of an aftermarket company.