2003 yukon smoething buzzing in headliner

[Nitis]

I have an 03 Yukon 4x4 basically as loaded as you can get

towards the far left side of the headliner over the drivers head once in a whil I get a humming or buzzing almost like some sort of pump trying to run. I slap the roof and it goes away but will eventually return. What could it be?

[kylep]

I'm not 100%, but I have a Tahoe and have the computer climate system and was told by the dealer that it is a small fan that sucks in cabin air to get a temp reading. Mine was rattling as well and he quoted me 250! I just stuck a paper clip in and out in till you couldn't see it to stop the fan moving .

[comicaltatertot]

Originally Posted by Nitis

I have an 03 Yukon 4x4 basically as loaded as you can get

towards the far left side of the headliner over the drivers head once in a whil I get a humming or buzzing almost like some sort of pump trying to run. I slap the roof and it goes away but will eventually return. What could it be?

Is a circle looking thing that has a bunch of holes in it? Cause if it is my moms 2002 burban does that I think there is a short in one of those speakers. Which would explain when you hit headliner it turns off then comes back.

[Sweet 72]

Originally Posted by kylep

I'm not 100%, but I have a Tahoe and have the computer climate system and was told by the dealer that it is a small fan that sucks in cabin air to get a temp reading. Mine was rattling as well and he quoted me 250! I just stuck a paper clip in and out in till you couldn't see it to stop the fan moving .

This is exactly what it is. You will also notice them above the driver and passenger area as well for their individual climate control.

[Bob_H]

Search out for climate control fan - there are several places on forums that give a basic go-by to remove and clean the fan or flat out replace it. You shouldn't have to pull the entire headliner - but access from the side/etc.. It is worth a try. My Mom's 2002 suburban had the same issue. Fairly straight forward to fix. It is NOT a speaker. Push up on the cover and you will hear the pitch change possibly go away. It is a fan.

[4x4toy]

http://www.rockauto.com/catalog/more...nid=512&jpid=1

[Russell Ashley]

Interesting. My 2002 Suburban does it too, but only when I'm on the highway at or above the speed limit. I'm glad to find out what it is.