Video First Look: 2011 GMC Sierra Heavy Duty
We've got a firsthand video tour of the all-new 2011 GMC Sierra Heavy Duty that debuted at this year's NTEA Work Truck Show in St. Louis.
While most of the technical specifications of GM’s Chevrolet Silverado and GMC Sierra HD pickups are identical, GMC is adding a new high-end Sierra Denali HD model to its work truck lineup. It will come with a choice of either the standard 360-horsepower / 380 pounds-feet of torque 6.0-liter V-8 gas engine or the class-leading 397-hp and 765 pounds-feet 6.6-liter Duramax V-8 turbo-diesel.

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