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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Best Duramax Engines
Reliability is another of the Duramax’s strong points; a Duramax engine can be expected to last around 200-300,000 miles without major issues. In 2001, the 6.6-liter, 300-horsepower LB7 was the ...