2011 Sierra Denali HDSt. Louis, Missouri – GMC has announced the new 2011 Sierra Denali HD, the first offering of the exclusive Denali line on a heavy-duty GMC pickup. The new Denali leads a redesigned lineup of 2011 Sierra 2500 and 3500 trucks that will include the most powerful diesel engine in the segment.

Sierra HD’s new 6.6-litre Duramax turbodiesel delivers 397 horsepower at 3,000 rpm, and 765 lb-ft of torque at 1,600 rpm.

“The new Sierra Denali HD is the latest expression of GMC’s Denali philosophy of blending capability with premium features and styling,” said Lisa Hutchinson, GMC product marketing director. “It is a premium tool that offers many comfort and infotainment features, along with a maximum towing capacity of 15,600 pounds with the segment’s most powerful diesel. That’s enough to tow a 34-foot-long, three-axle travel trailer.”

The Denali comes exclusively on the 2500 HD chassis, in 4×4 crew cab with standard box configuration. A Vortec 6.0-litre V8 gasoline engine with six-speed automatic transmission is standard; the new 6.6-litre diesel with Allison 1000 six-speed transmission is available.

Highlights of the new heavy-duty line include an increased towing capability to 9,072 kg (20,000 lbs) and payload of 2,873 kg (6,335); all-new fully-boxed high-strength steel frames; five 3500 models with payload capability greater than 6,000 lbs; 13 models of 2500 pickups with capability greater than 3,100 lbs; a new “smart” exhaust brake; and control features including trailer sway control, an integrated trailer brake control, hill start assist, automatic grade braking, intelligent brake assist and larger brakes.

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