2025 L5p Duramax Specs. Chevrolet has made big improvements to the 2025 silverado hd 6.6 duramax turbo diesel. 6.6l duramax diesel timeline identifying factory horsepower and torque ratings for 2001 to current applications.
Although sharing its displacement with previous duramax engines, one could almost. Similar to the lml, the l5p utilizes the same 6.6l.