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#1
10-08-2006, 06:58 PM
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A/C running all the time
My 1997 Silverado seems to have the A/C running all the time, when I turn off the truck I notice that the system would make a hissing sound like it was releasing air pressure. I wanted to know if this normal operation for this year of truck?
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#2
10-09-2006, 01:51 PM
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Re: A/C running all the time
I am not intirelly sure it is the A/C. It could be the fuel line releasing preasure back into the tank. if you have the interior set to defrost, that still uses the A/C compressor.
I had a 93 that would do that too.
__________________
  2000 Silverado Z71, 5.3L, K&N GenII Air Intake, Y-pipe Exhaust (no muffler), Bosch Platnium +4 plugs, 242k miles and still running.
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#3
10-10-2006, 04:40 AM
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Re: A/C running all the time
Could just be your intake. My 2004 4.3L's intake makes the sucking sound every time I shut it off.
Peace, Gary
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#4
10-11-2006, 07:41 PM
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Re: A/C running all the time
[quote=ThorAxe]My 1997 Silverado seems to have the A/C running all the time, when I turn off the truck I notice that the system would make a hissing sound like it was releasing air pressure. I wanted to know if this normal operation for this year of truck?[/quote.
I guess I should have mentioned that I checked under the hood and felt the A/C units and they were cold and sweating.
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