Just noticed yesterday in my wifes '02 Yukon that the climate control speaker looking thing has a buzzing sound coming from it. Starts off kind of loud but as the vehicle warms up and gets going it gets real quiet but you can still hear it at idle with the radio off. Anybody know what this means or how I can fix it? Thanks!

You need to replace it. It is the inside car temp sensor also called the aspirator.

Thanks, how hard is it to replace? Anybody know the part number?

You can gently pull down on the headliner and unplug it. Reinstall the same way but once you get the part you will see what your up against. Its not bad. If you cant get the headliner down far enough you cant take the a-pillar cover down and the b-pillar cover off to lower it more.

cool info...thanks