2024 Duramax Power Ratings. From a previous 445 hp at 2,800 rpm, chevrolet engineers have increased the l5p’s power to 470 hp. The truck's l5p duramax diesel engine received a substantial bump in power and torque thanks to a stout list of upgrades, including a new turbocharger, improved piston.
Other news, the 6.6 gasser gets the big 10 speed for 2024 and some new color and trim options. The diesel greatly improves on.