2025 Denali 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. The refreshed 2025 gmc sierra heavy duty arrives with a new, even more luxurious trim level.
The 2025 gmc sierra 1500 denali ultimate is the absolute top rung in the brand’s luxury truck hierarchy. Specifically, the redwood metallic (color code g48) paint option was retired from the 2025 gmc sierra hd colors, after it was built out on the 2025 model year in.