- Jul 27, 2008
- Minneapolis, Minnesota
Does anyone know what this is and what it does?
It is in the headliner right over the drivers seat and a bit to the left in my 02 avalanche.
I noticed that when I first start my truck in the morning and the engine is cold, I get a buzzing sound from there.
It is not so loud as to irritate the driver and some may probably not hear it but I do.
Either my brain eventually tunes it out or it just goes away after a while. I don't know when it actually stops buzzing but I just realize as I am driving along that the noise is gone.
I'd love to know.