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  1. Gen 5 & 6 Problems/Service Issues/Troubleshooting
    2004 Chevy Malibu 3.5L V6 - Once my car warms up it no longer has a problem but if I turn on the heater/defrost or ac while the thermostat dash needle is still under the middle it'll make a loud screeching sound. Once I turn it off it stops. I'm disabled but my son says the sound is coming from...
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