Review on Peopop Electric Upgrade 7L5533A226T 1999 2006 by Cody Hunt

Easy to install but no instruction included. The ground wires were too short, they had to be spliced together and a good foot of 8ga wire added to the negative terminal. This kit is for 2003-2004 models only. Both wires go to the ECU contacts. The white wire you see in the picture goes from the blue side of the control box to pin #42, and the greenish wire goes to the green side of the control box connector to pin #33. Online and other reviews of other similar harnesses tell you that you want to connect to -other. The fan ran at high speed all the time and didn't work when I turned on the AC. You need hptuners to get them working. I used the Silverado 2006 fan settings.