Question about 1998 Chevrolet Malibu

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2000 Chevy Malibu making knocking sound when AC is on

Whenever I turn the AC on in my 2000 Chevy Malibu, it makes a very loud knocking noise - especially when the AC is on low. What could this be?

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Is it noisy with only the blower fan on or does the A/C have to be on to get the noise.
Try using the heater only and see if the noise is present.
Let me know.
Regards,

Posted on Jun 19, 2009

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Posted on Jan 02, 2017

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