2024 Gmc Duramax Hp. The new l5p is the most capable duramax thus far offering 445 horsepower. From a previous 445 hp at 2,800 rpm, chevrolet engineers have increased the l5p’s power to 470 hp.

From a previous 445 hp at 2,800 rpm, chevrolet engineers have increased the l5p’s power to 470 hp. 2024 gmc sierra 2500 and 3500 hd first look: