This harness works with '05+ Silverado, OEM style e-fan assemblies for 2007 and newer (2008 frontend) trucks/suv.
Typically, this harness is used on the HD Trucks and SUV.
Note: The HD trucks are equipped with a mechanical clutch fan because it pulls more air during heavy towing. If your truck is used for daily driving and light towing then e-fans should maintain the engine temperature.
ECM activation is required for correct functionality.
ATTENTION:
It has come to our attention that a manufacturer has duplicated the GM OEM e-fan assembly incorrectly!
One set in particular is made by GPD. PN 2811689
Concern - e-fans turn backwards.
If you purchased this e-fan assembly then you must notify us before we ship your harness. This is not a mistake on our part, the manufacturer has built these incorrectly. They are designed to be a replacement for the 05+ and newer GM trucks but when installed the e-fans turn backwards and push air forward.