Thanks, that is what I figured. I guess whoever my guy talked to at Yukon didn't have any information what was in the kit or what else you need to install it. I had e-mailed them earlier before talking with the shop and basically got the same response, they make the kit but it didn't sound like many people had put one in and nobody knew even basic info.

I can source the switch, module and connector that the green plug above is connected to, I am down to making sure the diff kit has the internal wiring included. I would think they do, but I don't want to find out the hard way. The internal wiring has a connector that plugs into a connector mounted in the pumpkin that the harness tied above the spare tire connects to.

 

welp, I googled what you recommended not really thinking that it’d return anything useful, but sure as sh*t, the first thing that popped up was a link to all the codes.
Thanks for the guidance