Lots of condensation on the inside of windshield

Same windshield condensation problem just started recently on my 2011 Gen2, sure enough the headliner under the rear brake light is barely damp. In my case it's probably just the seals going bad with age but thanks for this thread - saved me a bunch of time! Too bad I'll probably have to pull the camper shell to get at it...

Edit Jan 2024 - I removed the 3rd brake light housing, cleaned off the foam adhesive tape that held it on stock and ran a bead of outdoor clear silicon around the interior back edge of the light housing where it contacts the truck and reinstalled. Almost no squeeze out and its a good seal - couple of winter storms and so far no more windshield condensation/leaks. The rubber gasket between the red lens and the black light housing was still intact so I didn't mess with it.

 

Happy they figured it out and will get fixed. I doubt there is any long term damage.

Sorry you had to take it in 3 times. That would piss me off too especially when it's a well known issue.