2004 silverado-hot air blows out of driver side vents.

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by Rodz, Jul 24, 2011.

  1. Rodz

    Rodz New Member

    2004 silverado - hot air blows out of driver side vents, pass side stays cold. Restart the truck, it returns to normal.
  2. stephan

    stephan New Member

    It sounds like the air door actuator is bad for that side Rod. Sometimes they strip out & reclycling the key or disconnecting the battery repositions them, but it doesn't last long before they're off again & can't move the air door or keep it tightly closed, so you end up getting heated air instead of AC.
  3. wbmartin3

    wbmartin3 New Member

    I've had the exact same issue with my 04 Suburban Z71. I've even learned to turn the car off on the freeway to reset the actuator; when I turn it back on, the a/c works fine. I can't find a photo of the actuator and I don't know what it looks like or I'd try cleaning it or replacing it. If you find it, please post a photo! -Bill
  4. pissonbinladen

    pissonbinladen New Member

    hot air coming from driveers side vents only

    I too have the same problem. Seems to do it randomly.. whenever it wants. It's almost like it seems to do it more often during the hot summer months.. compared to like during the Spring and early Fall seasons.

    I've got a 2005 Chevrolet Silverado LS crew cab.. just rolled over to 100k 3 days ago. But its been doing it for a while.. and I should have made time to take it to the dealership while the warranty was still in effect.. but when I bought the truck, I got the extended 100k drivetrain warranty.. but once again, she rolled over to 100k about 3 days ago.. so now I'm screwed and will have to pay for the repair.

    Anyone know about what this costs to have fixed? Just a ballpark figure...?
  5. ajarman

    ajarman New Member

    This has happened in my '08 Silverado my Dad's '09 Silverado my Mom's '08 Tahoe and a lady I work with, her '05 Equinox. I think it is just something funky with GM.
  6. stephan

    stephan New Member

  7. ohenry

    ohenry New Member


    I had this exact same problem on my last truck, a 2004 Silverado LT ext cab. Cost me $390 at an independent shop (parts and labor).

    LEVELEDZ71 New Member

    i had the same problem on my 04 silverado. I work at an independent shop and all i paid was our price on the driver blend door motor which was $136. thankfully this is the motor that is accessable from the passenhger side by just removing the lower heater case cover. If it would of been any of the other motors it would require full dash removal, draining the A/C, cooling system....a whole lot of bull **** for a simple motor. very simple to replace
  9. curtisjon

    curtisjon New Member

  10. fireman87

    fireman87 New Member

    I have an 04 silverado, with manual AC/Dual climate control>> been having this problem for about a year on and off...finally today i decided to investigate>>Took the left side temp actuator off was going to replace but instead there is like 4 clips that hold the housing together on the sides i used a small screw driver to open the clips and split the case... was careful to look at how it came apart.. but i took the white gear out which allows u to pull the black gear out notice where the tab is on the black gear, mark it with a marker if u have to.. underneath the black gear there are two metal tabs that looked to me to be the conductors that run on a halfmoon shaped electrical panel... Im assuming that this tells the computer where the door is located.. the clear grease that is on the gears had dropped onto the panel and coated the little conductors>> I bent the little tabs a little further so they had more pressure on the panel and cleaned the grease off of both reassembled the case and reinstalled it back into its position hooked the wire harness back up> And so far so good drivers side i can now control and it does not switch and blow hot air anymore>>> knock on wood
  11. paracutin

    paracutin New Member

    Give this a try before you starting taking the dash out and buying parts.
    Same thing has happened to me a few times in the past. Usually just the passengers side. Only way to fix it was to do just what you did and shut the truck off. However, there was a thread about calibrating the HVAC module actuators. Here it is.
    Fifth post down -
    Alternate Method (w/o Scan Tool).

    ​After doing this I have not had the problem come up again.

    Read more: http://www.gmtruckclub.com/forum/showthread.php/91016-Suddenly-HOT-air-from-vents!!!!#ixzz20oTichnp
  12. Skippy

    Skippy New Member

    Totally off the wall idea here, but I've done it in previous vehicles with success. Sometimes the door gets jammed due to a small piece of grit or particle, rather than an full actuator failure. Find a bumpy road and change the AC settings multiple times to engage the actuator door open and closed. Run the system on high to increase the chance the airflow will dislodge the particle while moving. You may dislodge the culprit particle and find your system is restored. It's a long shot, but on the off chance this IS the problem, you save $300 or several hours of work to get in there and find a french fry tip your kid shoved into a vent that has worked it's way down (or a leaf sucked in from the front.).

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