General Motors will roll out the revamped 2011 Chevrolet Silverado and GMC Sierra Heavy Duty ranges this summer with a variety of changes, notably more towing and payload capacity.
2011 Chevrolet Silverado HD GMC is also adding a premium Denali model to the Sierra HD series.
The Silverado and Sierra 2500HD and 3500HD come standard with a 6.0-liter Vortec gasoline V8 rated at 360 horsepower and 380 pound-feet of torque, mated to a six-speed automatic transmission.
2011 Chevrolet Silverado HD
Optional is a revised 6.6-liter Duramax turbodiesel V8 that now delivers 397 hp and a muscular 765 lb-ft and is equipped with an Allison 1000 six-speed transmission.
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