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Hello and welcome! My name is ***** ***** I can assist you with your question, Does the noise happen at idle when the vehicle is in park? If you remove the serpentine belt and start the engine, is the noise still present?
If the noise is no longer present when the serpentine belt is removed, then yes, this noise is coming from one of the pulleys. With the belt off, you can spin each pulley one by one to see which one is making the noise. The most common ones would be the AC compressor/pulley, the PS pump, alternator or even the water pump.
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Hello! It's Amedee from just answer. I am just checking in to see if you have any further questions?