leak at window over bunk cab

I am having almost the same exact problem you are having. Have probably spent 30 hours taking out/resealing windows, replaced all the running lights, resealing (and sometimes taking apart) every joint that I can thing of and still have water getting in the cabover. I have the bottom trim piece off under the cabover and have it temporarily taped over when it rains. After every hard rain after pealing back the tape there is moisture at the bottom of the cabover. Just a note on the sliding window - mine was leaking from the bottom also but when I took out the window to reset it the water was actually coming from above the top of the window frame and running around the frame and leaking out the bottom. I agree with the others to get a pressure test. The closest one I could find that uses the SealTech system was Stymeist Collision Center at 3948 Highway 49, Placerville, CA 95667. Don Hinshaw was the contact at 530 644-7703 They quoted me $150.00. For the time being I am going to try to rig up some kind of leak test system of my own and if I can't get that to work am going to take it down to them. Hope this helps, Jeff.