Fits: 2004.5 thru 2005 Chevy Silverado/GMC Sierra 2500HD/3500HD LLY Duramax Diesel

This upgrade kit includes an updated harness, updated bracket, and updated connectors.
The LLY engines are prone to failures on the original cylinder #2 & #7 injectors connectors. Failure of these connectors can cause the truck to have a hard engine knocking noise and/or multiple injector control circuit codes. 

Install Instructions