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Thread: Squeal

  1. #1

    Default Squeal

    I have a 2005 Colorado. There is a squealing noise (not very loud) only when the fan is on with /or with out the A/C on. I only hear it every few minutes or so, its not constant. It sounds as if its coming from the aft right corner of the engine bay. I'm pretty sure its from the A/C system there. But what is causing it? :( :

  2. #2


    It sounds like a bearing starting to go bad on one of the accesory pulleys.

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