That changeover occurred just a few years after GM began producing Duramax engines, with the LLY arriving in mid-2004. If you want to figure out which of these Duramax variants is under the hood ...

Read about Chad Simper's Twin Turbo Chevrolet 2500HD Duramax Diesel in this story by ... Chad is now having a race engine built by TTS Power Systems and Comptech that will combine LLY and LBZ ...

Read about this twin turbo Duramax with 650 horsepower and 1,215 lb./ft. of torque, only on dieselpowermag.com, the official website of Diesel Power Magazine.

6.6L L5P Duramax Turbo-diesel V8 While GM has agreed to replace affected trucks, the replacement vehicles will be subject to certain feature constraints due to the semiconductor chip shortage .

Early in the history of Duramax engines, GM changed the LB7 series of engines to LLY, but it can be difficult to tell them apart. Here’s how.