The GMC Sierra HD with the AT4X package features 35-inch OD mud tires, aluminum bottom plates and trim. The front suspension is new: both the upper and lower arms have changed, the steering knuckles have been modernized. Standard shock absorbers have given way to Multimatic DSSV struts. At the rear, a new electronically controlled differential appeared, and the Off-Road preset was added to the operating modes of the 10-speed transmission.
