2011 GMC Sierra Denali Heavy Duty Announced With Class-Leading Horsepower and Torque

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2011 GMC Sierra Denali Heavy Duty Announced With Class-Leading Horsepower and Torque
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A month after the debut of the all-new 2011 Chevy Silverado HD, GMC has now announced its version of the work truck, the Sierra Denali HD. Powered by the same 6.6-liter Duamax engine and 6-speed Allison transmission, the truck gets best-in-class power of 397-hp at 3000 rpm and best-in-class torque of 765 ft-lbs at 1600… Continue Reading...