I get that water thing. Let me tell you what I've found. If I use the heat, defrost or a/c and don't turn it off, I get a floor full of water on the passenger side. But only if it rains or snows, and not when the truck is running, only when the truck is shut off. If I turn the fan off and wait untill the vents completely close, no problem, even in a monsoon. Roll up the windows and turn off the radio and listen, you can hear how long it takes for the vents to close. When I shut off the truck before the vents are fully closed, they don't fully close. Stupid design. Well, that's my story.

 

I had a problem like this years ago on a Chrysler car. It turned out to be the AC condensation tube in the engine compartment (it was rubber or plastic) somehow it had sealed itself shut. All I did was flex it open and I never had a problem with it after that.

Tom

 

i had this problem in january-february. i complained to the dealership's service dept, and they tried to figure it out. when they did, it turned out to be a leak in the a/c ducting.

 

I had the same problem on passenger and then the drivers side. I ended up masking off the
extioror of the rear window and resealing it with black window rubber seal. Fixed the problem.