(continued from above)
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.
"The capability-enhancing attributes of the
Sierra All Terrain HD build on the already outstanding capabilities offered in
the all-new production Sierra HD trucks," said Hutchinson. "Although it is
strictly a concept, it is a pretty realistic one."
Purposeful Design
From every angle, the All Terrain HD looks the part of a dedicated off-road
performer, with bold, accentuated features complemented by a wide stance and
tall profile.
Streamlined bumpers are designed to enhance
approach/departure angles and incorporate frame-mounted recovery hooks - with
integrated skid plates. A large, airflow-optimized grille maximizes cooling in
tough conditions, while a forced-induction hood delivers more air to the Duramax
diesel engine.
"The design of the All Terrain HD is an expression of its
capabilities - strong, functional and absolutely professional grade," said Carl
Zipfel, design manager. "We're excited about the design elements and exploring
how they could apply to future GMCs."
GMC Sierra All Terrain HD Concept: Review (2/2)