NOTE: Most wiring harnesses are taking 1-2 weeks to process/ship due to a high volume of orders. If you need immediate shipping please call to confirm availability. To ensure your place in line, please place an order as we ship paid orders first before posting back in stock notices. We can refund at any time.
If you plan on adding electric fans to your full size truck, why not go with the highest quality kit available? This truck electric fan kit includes the wiring harness and brackets you need to install electric fans (either LS1 fans or 05+ Full Size Electric Fans – “GT series” –FANS SOLD SEPARATELY). Available in both two relay and three relay versions (more info). Our wiring harnesses are built in house and use the finest components, including all weathersealed connectors and robust relays. Note: photo shows three relay harness.
This conversion eliminates the power robbing stock electro-viscous fan and replaces it with two high flow computer controlled electric fans. Each fan is independently controlled by the PCM. This conversion has been credited with gains ranging from 15-20 RWHP and fuel economy improvements of around 1 MPG. The purchase of this kit includes a voucher for a FREE fan patch from us for the computer – you will need it to operate the fans. No operating system swaps required! Our kit is meant for gas trucks only.
Fans sold separately. LS1 fans can be added HERE. GT Series fans can be added HERE. NOTE: If you intend to use the GT series fans (larger) your truck must have the larger 34″ radiator option. If you have the smaller 28″ radiator, use LS1 fans OR our upgraded Spal fan kit with custom made shroud available HERE!
NOTE: certain E78 ECM operating systems (some 2011+ trucks, very rare application, usually 2500 trucks) do not always support electric fans. Please verify on your end before purchase.
2003-2007 assumes Classic body style, NBS 2007-2013 New Body Style.
Now available for rental or purchase – PCM of NC Fan Clutch Wrenches! Simply add to your cart at checkout and save yourself a trip to the auto parts store. Don’t want to keep it? Send it back within 30 days in working condition for a full refund!
Our manual fan switch (link) is also available for purchase with this kit. NOTE: Fan codes P0480, p0481, and p0483 need to be disabled in your tune for the fan switch, and set to NO ERROR REPORTING. We will do this for free if you send in your ECM.