Another water leak question

[Atcer2018]

Kind of makes sense when it comes to condensation. It rises up. I think!

Can you open all the windows on a nice sunny day? Or like I said, run the A/C to get the moisture out. If you run the A/C it should remove the moisture. If it continues, there must be a current leak somewhere.

I'm assuming it's not the heater core or you would smell antifreeze throughout the cab. It's very noticeable.

Did you check all the weatherstripping around the doors? Maybe a piece got knocked out of its track.

It was cool and dry out today so I left the windows open all day, hopefully that’s helped to dry out and residual moisture.
No smell of antifreeze so hopefully it’s not the heater core. I’m going to check the AC drain tomorrow.
All the weather seals are intact and in good shape around the doors as I just had them off over the weekend while pulling the shark fin antenna to reseal it.

 

[Atcer2018]

Today I went out to the truck and it was bone dry inside even though it was raining overnight. Maybe it was residual moisture. I still checked the door drains and the AC evap drain. All drains were clear but I decided to disinfect the AC evap pan since I was already under the truck and it was 60 degrees outside. I pulled the interior cabin filter before I sprayed the coil cleaning foam and I noticed this accordion like cover sitting on top of the area where the cabin air filter is at. It was open about half way but moves freely by hand. Does anyone know what it is or what it does?

 

[Litefghtr]

I'm running into similar problems. I have humidity on inside of windshield. No water on inside that I can find on carpets etc. Yesterday was the first time I saw water leaking out of my A/C drain hose. So I'm wondering if its a heater core, evaporator core. It leaks on passenger side and the small hose about an inch coming from the firewall. 2016 2500 diesel

 

[Burla]

what did you use to change the third brake light gasket and did you make a "U" which stops any leaking on any point of the you. Like the pic below, the only seams are on the bottom, as the pic is upside down?

 

[Atcer2018]

what did you use to change the third brake light gasket and did you make a "U" which stops any leaking on any point of the you. Like the pic below, the only seams are on the bottom, as the pic is upside down?

View attachment 513480

Yep exactly like in the pic. My issue turned out to be the rear Exhauster vents. I assumed that since I had the new style vents they wouldn’t leak. I assumed incorrectly lol
Dang things leaked horribly and even after I replaced them they still leaked a small amount. I had to use silicone caulk to completely stop the leaking.