How To Tell If A Duramax Engine Is An LB7 Or LLY
The powerful V8 engines did so bearing the name LB7, and yes, they were eventually replaced by Duramax builds branded LLY.
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6.6 Duramax Vs. 6.7 Power Stroke: How Do These Diesel Engines Compare?
It was replaced by the 310-hp LLY Duramax, with 605 lb-ft of torque, halfway through the 2004 model year. More changes with increased power came on a regular basis, with the LBZ in 2006 ...