2003 Yukon squeaky noise under dash

[Wahoo2]

I have a 03 Yukon with 130k miles. There is a squeaky noise coming from the drivers side dash. It happens rather driving or in park. It reminds me of a squeaky pump. It's has constant rhythm. I did a search but nothing came up with a drivers side noise, just passenger side results. Thanks in advance!

 

[Doubeleive]

if it is constant when parked then you should be able to remove the bottom cover under the steering column and see if you can better determine the source, takes a 7 or 8 mm socket and then once the screws are out it just pulls off, watch a youtube video for more accuracy on how to remove the panel it does come off really easy.

 

[Wahoo2]

if it is constant when parked then you should be able to remove the bottom cover under the steering column and see if you can better determine the source, takes a 7 or 8 mm socket and then once the screws are out it just pulls off, watch a youtube video for more accuracy on how to remove the panel it does come off really easy.

Thanks, I'll give that a try. I am going to try a stethoscope.

 

[RyanJW]

Does it happen only with the AC on?

Mine currently has a squeaking behind the dash, quite rhythmic. I narrowed it down to the AC blower but only when I have the front vents or auto selected. Trying to figure out what part to replace to fix it!

 

[ShaginWagon]

 

[RyanJW]

OK so after much google searching - I think I narrowed it down. The noise only happens when the AC is on and I have the front dash vents blowing...

Seems to be the mode door actuator looking for its location.