Squeaking coming from inside the dash?

So the heat and air are fine but when i switch from the settings like 1,2,3,4 and sometimes when it is on one setting for a while it will squeak. its coming from right in the middle of the dash. right behind where you can move the things that the air comes out of. i havent removed anything and actually gotten my hands dirty yet but i was wondering if anyone could give me any advice before i rip apart my entire dash? any help would be greatly appreciated.

So the heat and air are fine but when i switch from the settings like 1,2,3,4 and sometimes when it is on one setting for a while it will squeak. its coming from right in the middle of the dash. right behind where you can move the things that the air comes out of. i havent removed anything and actually gotten my hands dirty yet but i was wondering if anyone could give me any advice before i rip apart my entire dash? any help would be greatly appreciated.


FIRST OFF, WHAT YEAR? JUST FROM THE SOUND OF YOUR POST, IT COULD BE A PINHOLE IN THE AIR VALVE, AR YOU MIGHT HAVE A CRACKED VACUUM LINE, OR A BIND IN A VAC LINE.

its a 2001