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Discussion in 'General Chevy & GM Tech Questions' started by Bigrig, May 13, 2009.

  1. Bigrig

    Bigrig New Member

    Every time I get into our 2009 Silverado HD, we hear this whining behind the radio/Nav system, like a gyroscope or an automatic leveling thingy, trying to or is doing something. I just cannot figure out what is actually going on. Can anyone explain?
  2. markman34

    markman34 Member

    With my 07' I often hear the fan running to cool the Audio package. I have the CD,DVD,Sat Radio, mac daddy Bose setup in my truck

    While the truck is running it is too faint to hear, but when I shut the truck off I can hear the fan running.
    Maybe your fan is shot? A little noisy?

    Hope this helps!
  3. Bigrig

    Bigrig New Member

    Nope, I think I got an answer, it is the navigation system getting GPS Satellite info, then accessing the database on the disc. Complements of Chevrolet. Thanks ya all.

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