2015 Tahoe, water on passenger floor board

[JR2015Tahoe]

I’ve been battling the water on the passenger floor board, I think I found where the water is coming from, but still need to find the reason why it’s coming from there. Some of the seam sealer connecting the pillar to the floor board was cracked and water was coming in at that location. For now I just put cocking on it, to atleast stop the water from soaking the floors. Will now, when I get some free time pull the battery and see if any plugs behind it are leaking . Does anyone know if there is a drain plug under that pillar or a reason why it’s filling up?