My 2000 coupe has a stopped up AC drain. The vents fill with water on hot humid days, and it has poured out into the passenger side floor board computers - shorting them out. It left me totally stranded. I took it to the dealer and showed him the water. All he did was blow back through the drain hose and a month later it is doing it again. It's still under warranty, and so far 2 replacement computers have been put in the car, until I finally found the problem. Has anyone else had this problem? How did you get it resolved ? How can I let GM know about this crappy fix for a serious problem?