Help: Leaking Sunroof Track (not what you think)

[supershale]

Hello all. New 2012 3500 Limited owner here and chasing all sorts of water leaks. Already fixed the leaking antenna and third brake light. Still have a leak.

There are two channels that run parallel to the sun roof, one is for water, one is not. This sunroof is leaking from the channel that should not have any water in it. Stuck and endoscope in there and it looks like water is splashing off the pop-up spoiler. The channels designed for water are draining properly, as confirmed via endoscope; flooding due to clogged drain tubes is not the issue.

Any advice? Much appreciated.

 

[amurp15]

Bringing this back to life since I'm currently having the same issue. I have a 2016 2500 Crew Cab Laramie and the sunroof is doing the exact same thing. Can confirm because I have the headliner out and I'm waiting to put it back in until I fix this. If anyone has an idea of how to fix this, please reply.