Yep add mine to the list... I have a 2006 GTP Coupe. 30k miles. Water on the passenger seatbelt and by the rear window. My warranty is up but I took it for the same problem before so hopefully they'll fix it at no charge.
Hi I had the same thing happen to me in my 06 g6 coupe... I will say that when it happened I had left the sunroof propped open and it rained quite a bit that night. My sunroof stopped working and there was water in my dome light. I was lucky to still be under warranty and lucky that I had spotted the water by the seatbealt before this happened. I told the dealership that the water by the seatbelt was the cause of everything. Your best bet is to take it to the dealer because it could short out electrical parts in the car. I don't think this helped you much but that was my experience.My son is driving a 2006 Sedan (41,000) with power sunroof. After a good rain he found water in the overhead control console (dome lights) where the power roof switch is. Anyone else have the water dripping into that area from a plugged or disconnected drain hole tube? He has the car at college so I will have to wait til it gets home to check.
Any one with a similar experience and fix would be appreciated.