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GMC Envoy Heating Ventilation and Air Conditioning

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  • I HAVE A 2003 ENVOY...GREAT CAR..IT HAS 128,000 MILES ON IT..I ALWAYS SERVICE IT EVERY 3000 MILES FOR ENGINE OIL AND GREASE. LATELY WHEN I ONLY TURN TO THE LEFT AT VERY SLOW SPEEDS EITHER ON SNOW OR SAND THE REAR AXLE JUMPS OR SLIPS (TUGS)..YOU CAN FEEL IT AND HEAR IT. I TOOK IT TO MY DEALER AND HE CHANGED THE OIL IN THE REAR AND TOLD ME TO RUN IT FOR ABOUT AN 100 MILES AND BRING IT BACK AND THEY WOULD CHANGE IT AGAIN...WELL IT HAS ABOUT 120 MILES ON IT AND IT STILL HAS THIS ISSUE...SHOULD I GET THE OIL CHANGED AGAIN AND SPEND ANOTHER $54 BUCKS..OR DO I HAVE ANOTHER ISSUE OR SOMETHING THAT IS COSTLY...I NEVER ASK THEM TO CHANGE THE REAREND OIL DURING THE OWNERSHIP OF THIS CAR...I JUST THOUGHT THAT IT WOULD BE DONE DURING MY 128,000 MILE ENGINE OIL CHANGES..CONFUSED AND WORRIED..
  • tidestertidester Posts: 10,110
    Give the GMC Envoy Noises and Sounds discussion a try. The topic here is HVAC.

    tidester, host
    SUVs and Smart Shopper
  • My defrost is constantly blowing in my 2003 gmc envoy xl when I try to turn on any heat settings. The rear vents are not working at all and the floor vents are barely blowing any heat out. Any ideas on what the problem could be??
  • Have you solved the problem with the rear HVAC and radio controls. Mine is doing the same thing. It quit working about 2 years ago when my battery died after being parked for 2 weeks during a cold Michigan February while I was out of town. When I returned and got the vehicle started my rear control no longer worked. How did you solve your problem?
  • I recently purchased a 2004 Envoy SLT. The passenger side, no matter what setting is placed for the dual climate control, only blows ambient air temperature. It will not blow heated or cooled air. Is there a fuse that may have failed? Is there something I can review before taking it into the repair shop?
  • wkas10wkas10 Posts: 2
    Yes but only after 802 dollars later at the local GMC dealer- They had trouble even with external computer control. HVAC on these envoys is almost impossible they had it for a solid 2 days and the Dash completely apart on the service floor-
  • hardhawkhardhawk Posts: 702
    I have not taken Envoy in to dealer yet. Got a new Ford Expedition last summer and use it for primary vehicle now. I do need to get it in to the dealer. When I do and find out what happened, I will post. My 2002 Envoy will be 9 years old in July and just hit 85,000 miles.
  • robsavrobsav Posts: 2
    The blower motor will not turn off when key is off and vehicle is asleep. Is it the blower motor relay under the hood or the blower motor resistor (module) behind the glove box?
  • badddawgbadddawg Posts: 1
    I have a 2004 XUV. I recently had leaks in both spring air bags and replaced them. It work fine for about 2 weeks. Now they will not enflate. The pump is working normally and no leaks detected! Is there a relay/check valve that may be stuck open? Where is it located?

    Ty
  • blackbeauty5blackbeauty5 Posts: 2
    edited May 2010
    i have a 2003 gmc envoy when the a/c is turned on the truck idle up &down like a yo-yo then it stumbles and falls dead, it will restart but falls dead when compressor engage.i replaced the cycle switch but still the same ,i i am thinking the cilmate control panel? someone help me tackle this one.
  • tabbat72tabbat72 Posts: 1
    After driving my 04 Envoy (any distance) say to the store when I return and start it up the outside temp. gauge will show a lower than actual temp. Today it was at -12 degrees and giving me Ice warnings. The only problem is I live in FL and the temp was in the 90s today. This has been going on for a while now and causes the AC to blow hot air? After driving for a while it will return to the actual temp and the AC will work but sometimes it takes 20 min. or more to happen.
    Thanks, Bob
  • lesalklesalk Posts: 1
    Same for me and my 2003. Have you received an answer yet?
  • this is my problem my ac blower is not working discovered the problem when my boyfriend used my truck go figure lol he did a concerte job was really hot turned on ac an nothing!!! so went out turned it on nothing if i turn it up all the way truck idle goes up an down then dies. its way to hot to not have ac!!!!!!!! so he told me to try a site like this he said someone could prolly help. anyone else having this problem??? please help!!!!!!! :cry:
  • lotharplotharp Posts: 1
    Have you found out how to fix your air conditioner problem? I have an 02 Envoy that just started to do the same thing right when a 90 degree and higher heat wave hits lol
  • robsavrobsav Posts: 2
    edited July 2010
    My problem was that the blower motor would run even though the vehicle was off. My battery would go dead because the thing would run all night. It turned out that i needed to replace the blower motor resistor ($100.00) behind the glove box. If this is your problem then unscrew and remove the glove box lay upside down and look up. There are two screws and a plug to remove. Plug in the new unit and replace screws and glove box. good luck
  • dodge01dodge01 Posts: 12
    Any update on this problem? I have a 2004 XL and have similar issues. Sitting at idle and engine stumbles/sputters and stalls. Will restart but odd. And doesnt happen on regular basis. I will note next time of AC is on or not.
  • OK...I am baffled. I live in Houston. 95+ degrees everyday. I work nights. Get in Envoy when it's 88 degrees outside at 930pm. A/C usually works. Leave work at 0800 when it's 86 degrees outside. A/C usually works. When it's 95+ degrees at 1230pm in middle of day, A/C does NOT work. Any ideas????? PLEASE!!!!!!
  • hood4mdhood4md Posts: 3
    Not sure of the symptoms that you are having. My digital external temp indicator reflected a much lower temp that than it was outside (indicator showed 50 degrees, actually was 90+ outside) if this is your symptom, this is how I fixed it for my 2003 envoy back in 2008. Hope this helps

    ++++++++++++++++

    Not sure if this is related or not but...My A/C was intermittent in my 2003 Envoy. The external temp gauge was reading 50 on 90+ June days. It appears that the 'The ambient air temperature sensor' needed replacing. It mounts near the radiator. I replaced it in 10 mins and the part cost $21. The dealer was going to charge $200.

    If you replace it, you need to update the ambient air temperature display on the HVAC control module, perform the following procedure:

    1- Turn ON the ignition.
    2.-Simultaneously press the MODE, FRONT DEFROST and REAR DEFROST switches.

    This process worked a couple of times before I was able to replace the sensor. Hope this helps!!!
  • mic12mic12 Posts: 1
    My 2002 envoy is having a/c problems. it stops working after 30 min or so mostly when it,s hot out side. the temp on the inside reads normal temp for out side and also when adjusting the inside temp it appears to read to the temp selected. Any ideas? When it stops it blows outside air,which is the hot air from outside.
  • heater air blower motor won't turn on 2004 envoy
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