Does anyone have this problem? Above the drivers head is a small round plastic thing inserted into the headliner. I think it's got a fan in it because mine is making a good racket. What in the heck is this thing? I can hear it when I "key-up" the truck and notice it while driving..... I think it's driving me nuts.http://www.dieselplace.com/forum/smileys/Clown.gif Must be something to do with the AUTO AC system or just there to keep the liner from soaking?


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I hope that we have "all" had a Merry Christmas.

Beleive its the ONSTAR Speaker.

Richard, its the "aspirator" aka temp sensor for the inside air. Give it a good wack and that may quiet it down for a bit

Wacked the living hell out of it.... I now need to know what breaks up there...temper, temper.


Oh well, I'll guess GM will get me "another" in a week or so.....





---- Thanks Eric!


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