2025 Denali Ultimate Hd. 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 and 3500. The refreshed 2025 gmc sierra heavy duty arrives with a new, even more luxurious trim level.

It completes a quarter mile run in 14.9 seconds. Explore the 2025 gmc sierra 2500 hd & 3500 hd denali luxury truck.