2025 Yukon At4 Ultimate Review. The yukon includes safety features like. The new at4 ultimate trim package adds even more luxury and performance.
Gmc is adding a new at4 ultimate trim level to the 2025 yukon lineup, combining some of the rugged features and design cues of the at4 with the. New to the lineup for 2025, the yukon at4 ultimate is the ultimate luxury family hauler, with no sacrifices of capability!