So i was in my 06 truck the other day with a few buddys of mine, all of a sudden it started to pour down rain, my friends are like you know ur back windows leaking right, i was so mad, has anyone else had this happen to them and what do i do to fix it.

 

I found that my leak was a bad seal around my third brake light. It was dripping off the top of the headliner and running down the inside of the power slider right in the middle.

 

Same here. My 2004 F150 Supercrew would flood the back seat. The 3rd tail light had the gasket all mangled. I caulked around it. It's fine now.

 

me too.i've got an 04 with the same deal,took it to the local dealer,and they knew exactly what was up....so they had a stack of new third brake lights sitting there.funny.you think they would have fixed the problem by now.but they didn't hassle me about fixing it free.it looked like the heat and all got to the little foam gasket.looked cheap.