2024 GMC Sierra HD AT4X Diesel Takes On World’s Toughest Towing Test
This past year, GMC introduced the Sierra HD AT4X, its first off-road-focused HD pickup truck. Then, they went one step further with the SierraHD AT4X AEV Edition. With additional off-road components from American Expedition Vehicles, such as heavy-duty skid plates and stamped-steel powder-coated bumpers with a design that increases approach and departure angles, this edition…