2024 Duramax Diesel Specs. 2024 duramax diesel general motors announced a revised, more powerful version of the 6.6l duramax diesel for the updated 2024 model year gmc sierra and chevrolet silverado hd. The new l5p is the most capable duramax thus far offering 445 horsepower.
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 design, enhancements to. The new l5p is the most capable duramax thus far offering 445 horsepower.