2024 Duramax Horsepower. Other news, the 6.6 gasser gets the big 10 speed for 2024 and some new color and trim options. The new l5p is the most capable duramax thus far offering 445 horsepower.

Chevrolet has made big improvements to the 2024 silverado hd 6.6 duramax turbo diesel. Its power has been boosted from 277 horsepower to 305 and.