The Duramax 6.6-liter V8 turbo diesel engine produces 397 hp and 765 lb-ft of torque, a significant increase from 2010.
Duramax V8 Turbo Diesel Engine
The Duramax 6.6-liter V8 turbo diesel engine is an option, and adds $7,195 to the truck's sticker.
The Sierra Denali HD Pickup truck was equipped with a Duramax V8 Turbo Diesel engine.
Photo © Jason Fogelson2011 GMC Sierra Denali HD Truck
GMC Sierra Denali HD Test DriveQuick Look: GMC Sierra Denali HD HighlightsMore Pictures of the 2011 GMC Sierra Denali HD Pickup Truck
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