Note: If you have the larger 34" radiator, we make a harness for use with 05+ OEM GM Truck electric fans, referred to as the "GT Series fan harness. Add a note at checkout if you would like this harness to be setup for use with GT fans. Also note, the GT fans bolt-in with no mounting brackets necessary.GT harnesses will not come with the L-shaped brackets. This conversion eliminates the power robbing stock fan and replaces it with two high flow computer controlled electric fans. This harness will bring both fans on at half speed for low, and both on at full speed for the high setting, also commands the fans to run with A/C. This conversion has been credited with gains ranging from 12-18 RWHP and fuel economy improvements of around 1 MPG. This kit does NOT include the electric fan assembly. The item "PCM of NC 2007-2013 GM Full Size Truck Three Relay Dual Electric Fan Kit (NNBS)" is in sale since Wednesday, May 1, 2019. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Cooling Systems\Fans & Kits". The seller is "pcmofnc" and is located in Mooresville, North Carolina. This item can be shipped worldwide.