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1995 Chevrolet Suburban 1500 Question: Why am I hearing a squeaking sound at start-up from the compressor?

 

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cityilu5, 5.7L V8, Chicago, IL, August 11, 2013, 12:25
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Start up truck and I hear a squeaking noise from the engine compartment. When truck reaches operating temp. the squeaking stops. While squeaking when driving; as I come to a stop the squeaking stops, but when accelerating it comes back, but leaves when reaches operating temp.

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