spkr buzz from Onstar spkr

Recently our 2001 suburban is buzzing loudly from the Onstar spkr above the driver's head. Can anyone elighten me on this one please? We don't subscribe to Onstar. I haven't looked for the fuse yet but would pull it if that would fix it.
Best regards, and thanks to all,
Steve Paul
Nashville, IN

I had the same problem with my 2000 suburban and of course I thought it was a microphone for the Onstar system as well. I called my brother and he told me it was a small fan that is a sensor for the climate control system inside of the truck. When I took in for maintance the dealership fixed fit for me.

I had the same problem with my 2000 suburban and of course I thought it was a microphone for the Onstar system as well. I called my brother and he told me it was a small fan that is a sensor for the climate control system inside of the truck. When I took in for maintance the dealership fixed fit for me.
DED, thank you for your reply. I didn't think it was a speaker either but now a fan makes sense. Do you know if the headliner must be pulled back or can the fan just be pulled out?
Thanks again, I was beginning to think no-one liked me.
Regards,

Steve Paul

DED, thank you for your reply. I didn't think it was a speaker either but now a fan makes sense. Do you know if the headliner must be pulled back or can the fan just be pulled out?
Thanks again, I was beginning to think no-one liked me.
Regards,

Steve Paul


As a quick fix I reached my hand under the headliner and disconnected the fan until I was able to get it fixed.