Okay, I found the source of the main leak for most escalades, and ext's. I have a buddy that did it to his, a week after he picked it up in 07, and his is a early build. If your noise is coming from the window/ mirror area on your truck, I have a solution. Go to your local glass shop and pickup some black window urethane.... And I will take pics tomorrow. I did a small test before the actually glueing with stuffing foam in, and it completely solved my problem. I am going to be glueing it tomorrow for a permanent fix.