Mysterious leak

[Mikewhtm]

I have a 2018 1500 crew cab that I have been battling leaks with. I have sealed my third break light due to headliner stains, replaced my cab vents due to water filling the toolcubbies. Now I seem to have a new leak. There is a small drip from a seam in the back driver corner of the cab. Has anyone seen a leak from this seam? What would happen if I just sealed the seam? Sealing the seam would be my last resort.

I have already re sealed the top and sides my back window with silicon and the top drip molding as well. I have sliding back glass but that is not the source of the leak.

 

[Trucker2]

I just posted about the same leak on my truck. https://www.ramforum.com/threads/a-different-water-leak-location-2018-1500.199982/post-2797578
It was coming from the cab seam right below the rear window corner. i smeared it with sealer up and down the seam and it stopped the water.

 

[js12278]

Definitely has to be sealed from the outside.