Dirty air

[Catdog]

On my 2006 gmc Yukon, dirt comes out of the vents when I press the recirculate button. I'm told there is no cabin air filter, any thoughts please help

 

[ezdaar]

pull the lower cover off and clean the system. there's plenty of write ups here how to do it.

You can even look to GMfullsize.com for a write up how to add a filter.