2000 Chevy Suburban water leak driver door weatherstrip - how to fix

2000 Chevy Suburban front driver door leaking water weatherstrip.
How to troubleshoot and fix
The actual cause of the water leak is the sunroof, and the tubing that goes down the sides near the windshield.
I thought this was leaking because of the door weatherstripping, but a guy at the dealership said it's probably the sunroof, and he was right.
I was able to fix it myself, no parts needed, just needed to be cleaned out.

[@ryansmith2845]

Thank you, watched this video outside in the dark working on my 2001 Suburban. Both drains flow great now

[@LILMANlc]

I have a Tahoe same damn color too, my seats and everything are getting wet and we didn't know what to do I'm going to try this

[@SoftballRVDad]

Good luck. Let me know if it works for you. I haven't had any problems with water after I went through this process.