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Noise after turned off

  #1  
Old 05-08-2006, 03:57 PM
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I have a 2004 GM and after I turn off the engine, about 10 to 15 seconds, it makes a sound like letting the air out of a balloon and making it squeal. I have replaced the radiator cap becasue I thought it might be the pressure. Anyone with other ideas?


Thanks,Ron
 
  #2  
Old 05-10-2006, 03:31 PM
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It's probably just vaccuum pressure releasing after the engine is shut off. It's not causing any problems is it?
 
  #3  
Old 05-11-2006, 04:42 PM
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It does sound like some kind of valve that might be sticking for some type of vacuum. It does not cause any problems yet that I can tell. One dealer told me that when some of the A/C components get older that they can cause noises. Thanks for the information and comments.


Ron
 
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