Well I took the rear seat out yesterday afternoon and the wall carpet, had the wife spray the roof and back glass and found the leak, I have the tinyest of a hairline crack at the top of the slider track on the drivers side. so tiny i couldnt see it without the water coming through it, but it was pouring in. now I can see the crack plain as day that I know its there. In my case the water is coming in the crack and streaming down the edge of the slider track and then filling the lower track where the glass and cable slide in which then disperses the water throughout the back wall. there are so many additonal panels spot welded to the back wall that the water then finds its way behind those panels and then will just drip at random where ever there is a low spot.
Called the dealer for appointment and they are 15 days out at this point, hoping I can just bring it in show them the truck and photos and have them order the window proactively.