2025 Denali Ultimate 2025 Specs. The 2025 gmc sierra hd denali ultimate, refreshed for the 2025 model year, is gmc's most premium, luxurious and technologically advanced truck yet. Think of the denali ultimate as a luxury car or suv that just happens to have a bed.

Explore the 2025 gmc sierra 2500 hd & 3500 hd denali luxury truck. View detailed specs, features and options for the 2025 gmc sierra 1500 4wd crew cab 147 denali ultimate at u.s.