2024 Gmc Duramax Hp Specs. 6.6l duramax diesel timeline identifying factory horsepower and torque ratings for 2001 to current applications. A forum community dedicated to chevy and gmc duramax diesel owners and enthusiasts.

From a previous 445 hp at 2,800 rpm, chevrolet engineers have increased the l5p’s power to 470 hp. Gale starts by saying, “this is data that you won’t find on a spec sheet!” this new engine will be.