Do I need power at pin 4 on my tow vehicle?
I think y'all think I be dumb. I know I need to plug that big black rubber thing on my trailer into my truck (what else will keep the trailer from falling off the ball ;)) This year we're going to...
Forum Discussion
Your Yukon should have a relay possibly that was delivered in a bag and not installed in the distribution box. They are easy to install and cheap if not provided with the truck. Read the owners manual for where it goes.
