New 2011 GMC Sierra Heavy-Duty Trucks Deliver Best-In-Class Diesel Torque And Horsepower
The new 2011 GMC Sierra heavy-duty pickups are offered with a new 6.6L Duramax turbo-diesel V-8 that tops the segment in power. It is rated at 397 horsepower (296 kW) at 3,000 rpm and 765 lb.-ft. of torque (1,037 Nm) at 1,600 rpm.
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