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The 2004–2005 LLY Duramax engine marked a significant step forward with increased power output of 310 horsepower and 605 lb-ft of torque. It introduced a VGT turbo and addressed some LB7 weaknesses. Review the core technical details of the LLY Duramax engine, including the 2004 Duramax engine and 2005 Duramax engine specs.
Learn more: Guide to the 2004.5-2005 Duramax LLY
