Gmc 2025 Yukon At4 Ultimate. A new at4 ultimate model joins the range, and the optional diesel engine is now available on all trim levels. The popular suv will see some major upgrades to its interior, which pair well with a handful of styling tweaks.
General motors introduced the gmc yukon at4 ultimate for the 2025 model year, positioned between the denali and denali ultimate trims. While the denali ultimate may be even fancier than before, the at4 ultimate might be the best bang for your buck in the new yukon lineup.