The powerful V8 engines did so bearing the name LB7, and yes, they were eventually replaced by Duramax builds branded LLY.

Read more: Every Ford EcoBoost Engine Ranked Worst To Best Chevy's first-ever Duramax diesel engine, the LB7, debuted in Chevy's ¾- and 1-ton trucks, such as the Silverado 2500HD and 3500HD ...

General Motors’ 6.6-liter Duramax LB7 was a state-of-the-art V8 diesel engine with four-valves-per-cylinder producing 235 to 300 hp and 500 to 520 lb-ft of torque. In addition to a turbocharger ...