Here is a thread that will explain one way to do the electric fan.

http://forum.ls1truck.com/index.php?showto...3514&hl=05+fans

Depending on your controller many use the LS1 elect fans as I have and they do real well. Most of us have the NELSON tune and have the PCM and A/C wire control the fans through a set of relays on a harness made by Allen Nelson himself. There are other controllers out there if you feel so inclined.