Weird fan sound coming from my headliner

Discussion in 'Interior' started by harleynut05883, Aug 11, 2017.

  1. harleynut05883

    harleynut05883 New Member

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    I have a 2011 silverado ext cab and when it gets real hot outside I hear a noise that seem like a fan thats rubbing on something. I found it to be coming from my headliner. It kinda looks like a speaker from the outside of it. 20161218_155310_001.jpg What is the purpose of this fan.
     
  2. spanky

    spanky GMFS Senior Member

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    I think it has to do with sensing for the auto climate controls
     

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