Upgraded Fan Clutch for 2001-2010 6.6l Duramax LLY-LMM engines
Approximately 25° lower engagement temperature
Engages at approximately 200°F engine coolant temperature
Helps increase AC performance due to lower set point
Fits: 2001-2010 6.6l Duramax LLY-LMM engines in Chevy/GMC 2500/3500 applications