Underland 2025 Gmc. Gm has unveiled the refreshed 2025 gmc sierra hd, debuting fresh exterior styling, a new interior, a revised trim level lineup, powertrain updates, and more. It completes a quarter mile run in 14.9 seconds.

The 2025 gmc sierra 2500hd denali ultimate carries its 8,346 pounds of mass to 60 mph in a shockingly quick 6.5 seconds. It completes a quarter mile run in 14.9 seconds.