Sierra All Terrain HD (United States of America, 2011)

At the Detroit’s Motor Show 2011, GMC presented a new concept truck - the Sierra All Terrain HD.
Based on the new 2011 Sierra HD the All Terrain HD concept, its production-based 4WD chassis had been modified but still featured the same Duramax diesel/Allison 1000 six-speed powertrain. In order to deliver off-road capability, the All Terrain HD concept received enhanced suspension and unique body dimensions, including increased ground clearance and wider track. Still the concept vehicle maintained the HD levels of payload and trailering capacity.

Streamlined bumpers were designed to increase approach/departure angles and incorporate frame-mounted recovery hooks. The concept vehicle also features a large, airflow-optimized grille that is expected to maximize cooling in tough conditions. A forced-induction hood delivers more air to the Duramax diesel engine. At the rear, the cargo box features lockable, lighted storage compartments, along with a number of tie-down cleats, including a pair in the bed floor and two on each side of the bed.

The Sierra All Terrain HD concept is powered by the new, production 6.6L Duramax turbo-diesel V-8 combined with an Allison 1000 six-speed automatic transmission. The engine has a power output of 397 hp and produces torque p to 1037 Nm.