Little Speeker thing above Drivers head ?

[REMF]

Can somebody tell me what the little speaker thingy above the drivers head is in a 2000 Suburban. It is making noise and driving me nuts. It makes noise like a fan or somthing, but all the fans are off, it is a dull humming. And is there a way to fix it.

[DMC12]

Do you have climate control? If so, from what I understand that is the thermometer. It has a little fan that blows air to get an acurate temp reading.

[REMF]

Thanx DMC12, this Suburban is new to me and there is just so many things I am trying to figure out, the owners manual and even my Haynes manual do not cover alot of it.

[Flatrater]

Yes DMC12 is right it is used for the A/C system it is called an asiperator, if yours is noisy get it replaced.

[REMF]

Thank you also flat, now if I could just figure how to get the darn thing out