2025 Denali Hd Ultimate Test Drive. Learn more about the 2025 gmc sierra 2500 hd denali ultimate starting at $124,921.50. The denali trim moves to second place in the sierra hd’s hierarchy for the 2025 model year with the introduction of the new denali ultimate trim, available for both the 2500.

It completes a quarter mile run in 14.9 seconds. The sierra hd goes on sale in early 2023, with the at4x following later in the year.