2008 Denali XL Passenger Floor Wet

[tskw914]

Its been raining here the past few days and my 08 Denali XL lives outside, got in the truck and noticed a musty smell.. After a bit of searching I found under the passenger side floor mat the carpet was wet, and the padding, I am getting water in somehow and cant seem to replicate where with a hose. Sunroof drains appear clear, anyone know where they actually drain to? also wondering if this truck has a cowl drain which may be clogged? Never had a water problem before.

 

[Boyntonx2]

When I had that problem in my 05 it turned out to be a clogged ac drain hose