The 2025 GMC Yukon AT4 Ultimate is the peak of off-road luxury—combining rugged capability with first-class comfort. As the highest trim level in the AT4 lineup, the Ultimate edition boasts premium leather seating, a 16-speaker Bose sound system, an adaptive air ride suspension, and exclusive exterior accents that set it apart from the rest. With a 6.2L V8 under the hood, the Yukon AT4 Ultimate is already an impressive SUV—but Hennessey takes it to the next level.

By adding a high-performance supercharger system, upgraded internals, and enhanced tuning, Hennessey transforms the Yukon into a powerhouse that delivers exhilarating acceleration and unmatched on-road and off-road capability. Whether you’re tackling tough terrain or cruising in luxury, this supercharged Yukon AT4 Ultimate proves that adventure and performance go hand in hand.