The Duramax diesel is a series of diesel engines manufactured by General Motors. Here's a breakdown of the generations over the years.

the first iteration of the 6.6L Duramax diesel engine, the LB7, featured 300 horsepower and 520 lb-ft of torque. It was replaced by the 310-hp LLY Duramax, with 605 lb-ft of torque, halfway ...