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2002 Escalade
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207 Posts
Discussion Starter #1 (Edited)
So im used to hearing a slight hissing sound coming from the ac condenser or Lines after i turn off my engine, it quickly dies down after the engine shuts off. Normal right....

BUT Now i noticed that while the engine is running and is at normal operation temp, i have a constant hissing sound coming from that area, i cant quite figure out where, It goes in and out but is constant. I wiggle the Lines coming from the condenser but there seems to be no difference in tone. Do i have a Leak or is this normal?
 

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Sedan de Ville, CTS
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4,764 Posts
Dealer worked on mine five or six times for same problem. Then he found a cat under the hood.

Normal noise.
 

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2001 STS, 79 Eldo, 93 Sedan Deville, 2005 Escalade
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95 Posts
I notice the same thing and it doesn't sound right to me either for a luxury truck to sound like air is hissing out of it. I can hear it outside the truck after I shut it off also.
 
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