Speed Control Volume

[junglejet]

Hi everyone!

Just bought a 2002 Avy and love it! 

What a great web site for Avy owners!  A wealth of information to share our interests.

I was wondering if anyone has had trouble with what looks like a small microphone over the driver's head in the ceiling.  I believe it is a microphone for the speed control volume.  It makes a buzzing type sound that is annoying and the frequency goes up and down with the speed of the vehicle.  If it's not that, does anyone know what it is and why it's making that noise.  Thanks for any help and input on this.

 

[MS03 2500]

Haven't had that problem But to the club

 

[SpottyJ]

That is not a microphone.? That is the sensor for the climate control, the noise you hear is a fan that draws air to measure temperature.? There are many threads on the forum on this subject.? I will post a link shortly.? Expect this thread to be merged with existing topics.

Edit:? Added links.


(Link with photo
Buzz/Humming From ONStar Mic (actually Temp Sensor)

Small Air Sensor Over Drivers Head

Resonating Sound From Headliner

 

[m02redl]

welcome to the club junglejet
SpottyJ nailed it for you 

 

[sperry]

Oh, so common.

Even GM has a document for the mis-identification of the device.
to CAFCNA, junglejet!

 

[Maverick1974]

to the club junglejet

 

[junglejet]

Thank you all for the welcome and your knowledge on this issue.  I wasn't even close on guessing this one!   Motto:  Just shup up and ask what it is!  Thanks spotty.  I'll know how to proceed now.

 

[MS03 2500]

The club is usually very friendly and helpful, till you asked the question I never notice the thing.

 

[cadboy1]

Mine always makes noise on start up in the winter only. Radio goes on, cant hear noise 

 

[cadboy1]

I believe it is a microphone for the speed control volume.?

Speed control volume uses info from the speed sensor. Not by " The more noise equals more speed technique". hehehe. Thanks for the chuckle