2024 6.6 Duramax Engine Specs. Complete information, specs, power and torque ratings on gm's 6.6l l5p v8 turbo diesel duramax engine used in the chevy silverado hd and gmc sierra hd. 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.
Customers also have access to the 6.6l v8 l5p turbodiesel duramax engine as optional. Factory fill is delvac 15w40.