Arriving as either a regular, extended or crew cab configuration, the 2012 GMC Sierra 2500HD is a lead performer in the ‘professional grade’ segment of pickup trucks. Built on a rigid hydroformed box frame, the 2012 GMC Sierra 2500HD rides on a heavy-duty suspension package suited to extreme chores that includes trailer towing. Optional items designed to improve the capabilities of the 2012 Sierra 250HD pickup truck includes automatic locking rear differential, back-up heavy-duty battery and an Integrated Trailer Brake Controller. Powerplant selection for the 2012 GMC 2500HD consists of either a gasoline or diesel fueled engine. Standard on the pickup truck is the Vortec 6-liter V-8 generating 360 horsepower and 380 foot-pounds of torque. The optional engine is the 6.6 liter Duramax turbo-diesel V-8 which is design to move rear or all four wheels with 765 pounds-foot of torque. Towing ability with the 2012 GMC Sierra 2500HD sees up to 14,700 pounds available using the 6-liter V-8 engine and as much as 17,500 pounds of trailer pulling ability with the Duramax turbo-diesel engine.