Today GMC introduced the latest incarnation of its Denali line, the Sierra Denali HD. The new Sierra Denali HD delivers loads of luxury and has enough power to haul just about anything.
The Denali HD is based on the new 2011 HD chassis and comes exclusively in a crew cab, standard bed 4WD configuration.
When equipped with the optional 6.6L Duramax turbo diesel engine, the Sierra Denali HD boasts 397 horsepower and 765 lb-ft of torque. The standard engine is the venerable Vortec 6.0L V8 gas engine mated to a six-speed automatic transmission.
When equipped with a fifth-wheel, the Denali can tow up to 15,600 pounds, while the conventional hitch will tow up to 13,000 pounds.

Styling cues of the Denali include a bright chrome grille with the signature Denali oval perforations, monochromatic paint with matching painted bumpers, chrome door handles, chrome accent stripe and polished aluminum wheels.
Inside you will find brushed aluminum trim, power-adjustable pedals and 12-way power seats with available heating and cooling. The Bose audio system features surround sound, and optional heated steering wheel is sure to please in cold climates.
The Sierra Denali HD will be available in three colors: black, stealth gray and white.