This issue was found to be a problem. I tried to diagnose it, whether it’s the back window or another source. I want to as far as taking the whole entire backseat apart to figure out where this water is coming from because it was sending water through the floorboard and into the backseat, causing mildew And fogging up all the windows. I found that this issue was possibly coming from the cab vent in the back water is coming down the back of the cab and running down to the vent and then the way it’s designed the water comes inside that vent hole and is not Coming from the window or possibly it is coming from both. But definitely water is coming from the back vents and you can’t get to these area because of your truck bed and on my way to get to it is from the cab taking all your seats apart.

This is definitely a design issue cause they Potential health hazard and definitely ruins your upholstery and everything inside your vehicle how this is not a manufacture defect I don’t know. Addition to water coming into windows. I’ve had excessive amount of water in the doors so water is coming down the side doors and filling up the doors inside cavity slashing out poor design. There is a plug on the bottom of the doors, I was able to take the rubber Gromit out of this And be able to drain the door, but ridiculous. Don’t really have to be a detective to forget all these problems.