Gmc Ultimate Denali Package 2025. Vehicle specs | 2025 sierra 2500hd & 3500hd denali ultimate. The 2025 gmc sierra hd denali ultimate, refreshed for the 2025 model year, is gmc's most premium, luxurious and technologically advanced truck yet.
View detailed specs, features and options for the 2025 gmc sierra 1500 4wd crew cab 147 denali ultimate at u.s. Discover the 2025 gmc sierra 2500hd & 3500hd denali and the first ever denali ultimate, with 30,800 lbs max towing, premium comfort, and more.