The 2011
GMC Sierra 3500HD's chassis cab truck delivers greater capability, efficiency, and refinement than the models they replace. The Sierra 3500HD features a new, stronger independent fornt suspension with a front axle weight rating that increases up to 25 percent, which expands the range of upfit capabilities, including a new ambulance prep package. The 3500HD also has a longer wheelbase to enhance the ride and handling characteristics of the truck.