I knew the GEM module is going out in the truck. It's always a good idea before you go to fix a problem you want to be sure your are fixing the problem . Simple stuff like a bad fuse, or bad relay switch are cheap and easy fixes. Or you spend all that time wiring around a GEM to find out the motor isn't working or what if it's two problems. You want to make sure you have enough understanding of the problem or problems to know what needs fixing.