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GMC Envoy Heating Ventilation and Air Conditioning

37 messages,  Last post on Aug 30, 2009 at 9:35 AM

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What is this discussion about? GMC Envoy, Heating / Cooling, SUV

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#34 of 37 GMC ENVOY Air problem by payge Jul 16, 2009 (10:40 am)
I have a 2003 GMC ENVOY. Last month the air would just stop working for 5 sec. and then turn back on. It would quit for 15 sec and then turn back on. Then it would work fine. Now I am lucky if the blower works at all. I would like to know if anyone else has had this problem. Sometimes the air works and sometimes it will not. It will work on 1,2,3,4 and will quit on 5. I can sometimes get the vent air to come on and then hit the air button and sometimes the air will kick on. I don't believe it is the compressor but maybe a switch. I called my local GMC dealership and they said they have never heard of this problem. I do not believe that. Not from reading this. Any help will be great. Thanks.
#35 of 37 Heat/Air problem by oncelost Jul 16, 2009 (4:07 pm)
I have a 2002 Envoy and am having a problem. When I turn heat/air with the drivers or passenger control, extremly hot air is blowing out the passenger side. No matter what temp I set the passenger to it blows as hot air as possible, while the driver blows whatever I set it at. Does anyone have a clue? I would appreciate any help.
#36 of 37 Re: 03 Envoy Random HVAC Blower Operation [siksa] by onionring Aug 21, 2009 (12:41 pm)
Replying to: siksa (Aug 29, 2008 3:42 pm) Is the module under the foam padding underneath the blower motor (towards the floor side)...I've only dropped the glove door down to look behind it...I can see the blower motor unit....also what color are the wires that plug into the blower from the module??..looks like a purple and brown wire..
#37 of 37 02 Envoy XL Rear Air Problem by bowtieracer Aug 30, 2009 (9:35 am)
I have an 02 Envoy XL. Automatic HVAC controls. The rear air blower quit working. I removed the rear panel to access the blower assy. Upon doing some tests, I found that the motor would blow fine if I manually grounded the ground wire that goes to the motor. Is there a bad control module somewhere that controls the motor with it's ground or is the front control switch bad? I'm not familiar with this vehicles wiring configuration and am at a loss as to where to check next. Any history on this problem? Thanks in advance.

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