Western SnowEx Part # 78490 – GM Supplemental Harness Kit Here is an update kit for some of the 2014 and later Chevy and GMC trucks that came with the plow prep package. The truck have a voltage over load when you use the plow and let off the controller. This adds a 3rd plug to your 2 plug Fleet flex plow and corrects the problem. What happens is the overload causes the truck to shut down the dash and radio to protect itself. Before installing this kit you will need to get the GM UI Bulletin #124b, This is for trucks that have the Snow plow prep package cause they have the larger alternator. You will need the GM harness kit 84043394
