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Chevy Silverado and GMC Sierra Climate Control

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Comments

  • Any chance I could more details. Where exactly is the air box cover? Any chance I could get a picture?
  • I had the same problem on my 04 silverado. There would be hot air coming out about every other time i started the truck. Chevy has an updated part now, there is a parts problem. I took the actuator out then cleaned and lubed it. It has worked great for over a year.
  • Hey,

    I have an 05 sierra denali. I got home from a trip and it was doing the same thing. Blowing hot on the drivers side and AC working on passenger side. I removed the AC fuse in the engine compartment and disconnected both battery terminals. I then waited 5 min and reconnected battery and installed fuse. I then put the key switch to the on position and turned the ac to the off position. I started the truck and set it to auto and within 15 sec i had AC on the driver side. Its worth a shot before going to the dealer.

    Dwayne
  • ia2189ia2189 Posts: 2
    How do I tell which fuse is for the AC?
  • awkirbyawkirby Posts: 1
    Hi, I'm new here and I have a..
    1994 GMC Sierra 4.3L V6 (Manual) that has a problem.
    Until recently I had a compressor that was completely locked up. I was driving home when the engine quieted down.. (Like a normal noise), I was startled, being used to a loud idle noise. (I have the impression that a quieter engine is a GOOD thing).. I carried on and went back out a couple hours later to start hearing a metal on metal noise..
    To the best of Our knowledge we believe it is the compressor's bearings are completely shot giving play where there shouldn't be, and making a terrible noise (not to mention how it sounds on my school's campus!)...

    Anyway, I am looking for any quick fixes to this, if we are on the right track.. etc.. and so on.

    Thanks alot.
  • obyoneobyone Posts: 8,065
    Is there a seperate belt to drive the compressor? if so, cut it.
  • Is this fix still working? Bought a 2004 K2500 crew cab about 3 months ago. Air will be working fine and then driver's side will blow hot air while passenger's side is still blowing cold. Turn switch off and then turn back on and everything is fine for a while. It started out only happening once in a month and now it is about week or so.
  • Sounds to me like a short in the wiring harness
  • jhagerjhager Posts: 1
    I need directions for changing blower motor on 2000 Silverado. Where is it located, do I need to remove the glovebox to get at it? And can a "weekend mechanic" do the jpb?
  • obyoneobyone Posts: 8,065
    I would recommend purchasing a subscription at www.alldatadiy.com for your Silverado. Aside from the factory manual, alldata provides the diagrams and step by step instructions that's almost as good as the $200 factory manual. They provide it online, 24/7 for, if I remember correctly, $14.95 per year per vehicle.

    I looked up what you're asking for and without the manual to refer to, I wouldn't want to attempt the job.
  • 2004 CHEVY SILVERADO 33000 MILES
    I HAVE BEEN READING THE BLOG AND HAVE THE SAME PROBLEM WITH MY CLIMATE CONTROL, COOL AIR ON DRIVERS SIDE, HOT ON PASSENGER SIDE, HAS ANYONE GOT GM TO HELP OUT WITH THIS PROBLEM. I HAVE BEEN IN TOUCH WITH DIST. SPECIALIST TO NO AVAIL. HELP!!!!!!!!! THEY WANT WELL OVER $500.00 TO FIX PROBLEM.
  • I was told it was the accuator(sp) the 2004 GMC Sierra had a recall on the instrument cluster, I took my truck in and had that replaced, I don't recall my air getting hot on the drivers side since then. It probably wasn't related but thought I'd mention it. I've since sold my truck. :(
  • DIST. SPECIALIST # 866-790-5700 MAYBE IF WE COMPLAIN ENOUGH WE CAN GET A RECALL.
  • obyoneobyone Posts: 8,065
    There is a technical service bulletin to correct this problem. It is normally covered under warranty. Unfotunately, yours failed outside of the warranty period.
  • Did you try what i suggested in post #159? It only takes 15 min or so. I had the same problem and its been working for 2 weeks now. As for the fuse to pull it is labeled HVAC and is located in the fuse box in the engine compartment. Good luck.
  • I followed the instructions on this blog and it worked for me. Disconnect the battery and wait for awhile then reconnect. I had to do it a couple times and also realized that because I have a diesel I had to disconnect both batteries (duh!). Also, turn off your climate control before shutting off the vehicle and then disconnect the battery.

    It cleared up my issue, good luck on yours.
  • Isn't it kind of dangerous to hold your battery cables to get for 30-45 sec.?:(
  • Hello, I'm having the same issue w/ my ac not working and air only coming out of the defrost on my 03 chevy silverado. Did you fix your problem??

    Patrick
  • Just turned the heat on in my truck for the first time this fall and only had heat coming out of the dash under hard acceleration. The rest of the time it blew cold regardles of the position setting. Also, when i tried to put it on recirculate, the light flashed a few times and turned off. The temperature gauge was also way up the hot end and didn't come down. Any suggestions would be appreciated!
  • obyoneobyone Posts: 8,065
    Check your coolant level in both the overflow box and the radiator.
  • Thanks. I will do that and see what happens.
  • Topped it all up and everything appears to be working fine. Thanks!
  • obyoneobyone Posts: 8,065
    Glad it worked.
  • when you hold the cables together they are not connected to the battery. your just holding the cables together you dont have to try it but it worked for me. I got the idea from the tv show TRUCKS on spike tv. i have not had any problems since, did it about 6 monthes ago
  • farva1farva1 Posts: 1
    I HAVE A 06 GMC SERRIA MY A/C WILL BLOW COLD AIR THEN IT WILL START BLOWING HOT AIR.WHEN YOU TURN THE A/C OFF IT WILL STILL BLOW HOT AIR.YOU CAN RESET THE A/C SOMETIMES IF YOU TURN OFF THE ENGINE AND RESTART THE ENGINE. ANY HELP OUT THERE.
  • Hi
    I have a 2006 serra and the Fan motor is noisey and squeaking the first 2 minutes its turned on. Its like a dry shaft in the motor assembly. It very annoying. My problem is I'm trying to remove the fan motor to fix. I have remove the black shroud that covers the fand and vents, but can't figure out how to get the fan motor out. Please help
    Daryl
  • chevy4mechevy4me Posts: 203
    I have had the truck since new and it now has 68,000 miles.The noise began near three yearsuse and has been intermittent . I noticed a drop in cooling ability last year and I did add a can of r-134 this year. That made it blow much colder but the expansion valve noise did not change. It can be quite loud at times but is tollerable( stereo volume up).When the truck was under warranty the dealer dealer told me it could be replaced ( the valve) but it would end up doing it again. I'm wondering if this is common with the 99's and has anyone with this problem been solved ?
  • I was driving along the other day with the A/C on and started to smell burning wiring (kinda of hate that smell being a commercial pilot) and a little smoke. Then the blower fan stopped working. i pulled over and looked under the dash and the four wire connector going into the fan box was smoking and melted...so were the wires for about an inch back from the plug.

    I am taking to the dealership that I bought it new at on Monday, but am asking you experts if their is any documentation of this being a problem? The dealership that I bought it at is one of those high volume stores and they have a reputation of being hard to work with on the service side.

    Any help would be great!
  • obyoneobyone Posts: 8,065
    I have never personally heard of anything like what you described happen. I frequent several GM boards none of which reports anything like above.

    If you find your dealership hard to work with on warranty issues, give GM customer service a call and they usually can refer you to another Chevy dealership in your area. With what you describe, I don't think that the dealship can question or deny warranty coverage as the results (burnt wiring) is obvious. Probably due to a ground condition somewhere along the wire.
  • I am also currently having this issue i have a 2005 sierra 2500 with 20,000 miles the thing is only used during the winter and my heat /ac does not work brought back to the local dealership where i bought it from and was told a bad relay caused the wiring harnes to burn up and was quoted 300 to fix i think that is b.s. it is obviously a factory defect i called gm cosomer service and they offered to pay for half but will not cover the whole repair. the tech at the local dealership said he sees this all the time obviously they have a problem.
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