LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Hissing sound from passenger side?

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Old Mar 1, 2005 | 09:36 PM
  #1  
crAzy95z28's Avatar
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From: Houston, Tx
Hissing sound from passenger side?

well just notice a LOUD hissing noise from my passenger side, near the firewall!!

what could this be?

randy
Old Mar 2, 2005 | 07:56 AM
  #2  
IslandZ's Avatar
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From: Curacao (Caribbean Island)
Re: Hissing sound from passenger side?

Vaccuum leak from the HVAC vaccuum container, or maybe a vacuum hose is torn. Also check the HVAC check valve.
Pix of these can be found on Shoebox's website.
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