1. The dual fan control harness kit, this is a replacement parts that are very suitable for your car2. All wires connectors are strictly tested and assembled, and all wiring are subject to testing to ensure the continuity of all terminals.3. Made in accordance with the oem specifications, matching with the car, easy to install. Durable Materials Made of plastic and copper wire materials, wear-resistant plastic sheaths prevent leakage. Has good contact, good conductivity and durability. Direct Fit This fan control harness matches the function of your car's fan harness very well. Use the model connector, after factory testing, can be directly installed and the performance can be restored. Diverse Applications This dual speed electric fan control harness is suitable for various models of vehicles: For example compatible with Chevy Silverado GMC Sierra Tahoe Yukon, to name but a few. Installation Notes:This dual speed electric fan harness kit is easy to install. Just use the provided equipment to install the relay center on the fuse box cover, then connect the power cable, two ecm control cables and the ground wire, and then insert the two fan plugs into the electric fan set of the automobile. When both fans are turned on, they will be at high speed. When one fan is started, both fans will be at low speed.Package:1 pcs dual speed fan control harness kit Partially matched reference model:Compatible with Chevy Silverado 1500 2500 pickup - 1999 2000 2001 2002 2003 2004 2005 2006Compatible with Chevy Silverado 3500 pickup - 2001 2002 2003 2004 2005 2006Compatible with Chevy Silverado 1500 2500 3500 pickup 2007 classic style (creased dr skin)Compatible with Chevy Escalade/ Escalade ESV/ Escalade EXT - 2002 2003 2004 2005 2006Compatible with Chevy Avalanche 1500 2500 - 2002 2003 2004 2005 2006Compatible with Chevy Suburban 1500 2500 - 2000 2001 2002 2003 2004 2005 2006Compatible with Chevy Tahoe - 2001 2002 2003 2004 2005 2006Compatible with Chevy Tahoe 2000 Silverado styleCompatible with GMC Sierra 1500 2500 pickup - 1999 2000 2001 2002 2003 2004 2005 2006Compatible with GMC Sierra 3500 pickup - 2001 2002 2003 2004 2005 2006Compatible with GMC Sierra 1500 2500 3500 pickup 2007 classic style (creased dr skin)Compatible with GMC Sierra Denali - 2002 2003 2004 2005 2006Compatible with GMC Sierra Denali 2007 classic style (creased dr skin)Compatible with GMC Yukon - 2001 2003 2004 2005 2006Compatible with GMC Yukon XL 1500 2500 - 2000 2001 2002 2003 2004 2005 2006Compatible with GMC Yukon 2000 exc. denaliPetrol/ gas engines only, does not fit diesel