funky vent smell

[Stabone]

I have an '05 z71 and I have a funky smell coming out of my vents when the air is on. Smells really musty. I know the '05's don't have cabin filters. Anyone have any ideas how to get rid of it?

 

[JKmotorsports]

Here's a thread I posted a while back to alleviate the a/c odor problem.

 

[Stabone]

man, there has got to be something more simple to fix this problem.

 

[Stabone]

still under warranty so taking it in Tomorrow. They said it could be a lengthy (all day) project.