Is the leak between the frame and the body? or is it between the glass and frame?

 

Very good question. I think mine leaked between the seal and the glass but, I'm not sure.

RP

 

It is hard to say where it came from, but when I took the 3rd brake light off and looked, it seemed to be between the frame and the body. If you take the third brake light off, you can see there is a tunnel across the crest of the cab that is dead air. From what I can tell it leaks from somewhere in that tunnel.

My truck would leak from the top drivers side. Others have had different leak locations. It was really bad, so much that it would drop water on my head and shoulders.

Just one of the reasons for selling that truck.
Love my Expedition though.