Back In Stock!
Finally a heavy duty fan upgrade option for Trailblazers! This kit includes two high flow 12 inch Spal fans and a custom black powder coated shroud that uses factory mounting points – no drilling or cutting needed! Fits 5.3L and 6.0 Trailblazers/Envoy/GMT360. This conversion eliminates the power robbing stock electro-viscous fan and replaces it with two computer controlled electric fans. Each fan is independently controlled by the PCM.
Spal Fans & Shroud ONLY – Available if you already have one of our electric fan harnesses (made after 2011) and only want to upgrade the fans.
Two Relay Spal Kit – Complete kit that will bring one fan on at full blast for the LOW setting, and both fans on at full blast for the HIGH setting.
Three Relay Spal Kit – Complete kit that will bring both fans on at half speed for the LOW setting for quieter operation, and both fans on at full blast for HIGH.
The purchase of this kit includes a voucher for a FREE software fan patch – required to control the fans by computer. This conversion has been credited with gains ranging from 12-18 RWHP and fuel economy improvements of around 1 MPG. These fans can be hard on the electrical system, our three wire battery cable upgrade kit (P-070009 & P-070010) is highly recommended.
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!