This is the upcoming GMC Sierra AT4X HD undergoing testing before its reveal. The heavy-duty off-road rig is wearing a healthy amount of camouflage front and back, disguising what is likely to be high-clearance front and rear fascias. The wheels are also camouflaged.
As reported by GM Authority earlier this month, the ’24 Sierra AT4X HD will feature 35-in. tires and DSSV dampers—both firsts for the Sierra HD. The model will slot above the existing Sierra AT4 HD as the most capable off-road-going Sierra HD. A debut should come in the next few weeks.
Photo credit: Brian Williams, SpiedBilde