Truck Concept GMC Sierra All Terrain HD The concept GMC previewed Thursday features a 39-degree approach angle and 31 degree departure angle. Built on an '11 Sierra 2500 crew cab body, with a 1500's five-foot, eight-inch box, the concept has a stock Duramax turbodiesel, making 390 horsepower and 745 pound-feet, like the production engine. Transmission also is stock, the Allison six-speed automatic. Thanks to the non-stock box/body combo, the concept's wheelbase is 149 inches, two inches shorter than a Sierra 2500 Crew Cab.
GMC Sierra All Terrain HD Truck Concept
GMC Sierra All Terrain HD Truck ConceptSuspension features custom upper- and lower-control arms, and Fox supplied second rebound shocks front and rear. Tires are knobby 35-inch BFGs on 20-inch aluminum wheels. The front clip and hood is unique to the concept, with larger hood intakes to feed more air to the 6.6-liter Duramax. On the profile, you'll notice a blacked-out b-pillar and anodized trim. A custom automatic swing-down entry/exit step stays out of the way for serious off-roading, and there's another swing-down step for the box just behind the rear doors, for easier loading and unloading.
It's no basic work truck, which means the leather interior is straight out of the HD Sierra Denali. A new radio includes an 80-gig hard drive. The concept adds lockable side storage compartments, with an electrical outlet, a compressed air outlet and a 360-degree floodlight in the box.
