The Sierra LD AT4 and AT4X are built as the mechanical backbone of desert dominance, engineered for raw power, traction and durability in extreme terrain. With a rugged off-road suspension, locking differential and robust underbody protection, they deliver confident control for aggressive dune driving and challenging landscapes. This is the serious off-road tool in the GMC lineup—designed to tackle the toughest conditions while maintaining a commanding presence and uncompromised capability.
The Yukon AT4 and AT4 Ultimate deliver full-size off-road authority with confidence and control. Every journey—whether conquering desert dunes or cruising the open highway—is an opportunity to lead with power while enjoying unmatched comfort. Advanced four-wheel drive systems and off-road engineering ensure precise control across challenging terrain, while the premium interior, with high-end amenities, offer an elevated travel experience. The Yukon AT4 line strikes the perfect balance of power, control and comfort on every drive.