2024 Gmc 6.6 Duramax Specs And 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 motortrend buyer's guide has the 2024 gmc sierra 2500hd specs you need, from dimensions and cargo space to power and mpgs.

2024 gmc sierra 2500 and 3500 hd first look: Duramax’s are easy on oil.