Question about 2004 GMC Envoy

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No cold air w/air conditioner on for a 2004 GMC Envoy.

With the compressor running, what is the p.s.i. reading of a fully charged air conditioning system on the 2004 Envoy with front & rear controls.

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Can't go by the pressure. Ck the large lone coming out of firewall, should be col. Small line at ac condensor in front of radiator should be hot.

Static pressure on high side probably 80psI Running 30 on the low side and 1130. will vary depending on oiutside temp Hope this hekoped

Posted on May 27, 2009

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1 Answer

Gmc envoy 2004 air won't work


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Why is my 2003 gmc envoy air conditioner blowing cold air intermittently?


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Jul 03, 2014 | 2003 GMC Envoy

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Why is my 2003 gmc envoy air conditioner blowing cold air intermittently? ive read something about the ambient air temperature sensor but would really like to be a little more sure if at all possible


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Jul 03, 2014 | 2003 GMC Envoy

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When you switch to defrost or the air conditioner, the vehicle shuts down completely


Does it shut off, like the electrical system shuts off and the engine slowly stops (the same as when you turn off the ignition)? Or does it stop abruptly and with a noise, like a squeal or thunk? If it is the former, then it is a short (or bad ground) in your air conditioning system. If it is the latter, then, yes, it could be the compressor bearings are seized.

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Problem with heating and air conditioning. The driver's side is blowing hot air and the passenger side is blowing cold air


Air Conditioner blows warm air
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  2. Air conditioner compressor clutch not engaging. Check compressor clutch wiring, electrical connections and compressor clutch, and repair or replace as necessary.

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My GMC Sierra's air conditioning works great but the driver side vents will spontaneousely start blasting out hot air. The passenger side continuse to blow cold air. If iI turn the truck off and...


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  2. Air conditioner compressor clutch not engaging. Check compressor clutch wiring, electrical connections and compressor clutch, and repair or replace as necessary.

May 24, 2011 | 2005 GMC Sierra

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Your best bet is to take it to a repair shop that does air conditioning and they may need to add freon and possibly some dye to determine if there is a leak. You can purchase a kit to add the freon yourself but these systems require a certain amount and over charging the system can also cause problems.

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Why does it sound like an air compressor is always running?


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I took my 2004 gmc envoy xl in to have the a/c filled up...


Your local auto parts store should have the stuff to tests for leaks. They should have a can of ac refill that has a an additive to repair small leaks.

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