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  1. #1

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

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

  2. #2
    stephan's Avatar
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    Sep 2010
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    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.
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  3. #3


    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. #4

    Default 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. #5


    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.

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  6. #6
    stephan's Avatar
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    Did a google search for a pic & it lead me right back to GMTC (go figure, the best site on the net). Heres a link to a page where Steve is posting a blend door actuator for sale & it has a pic.

  7. #7
    Jr. Mechanic
    Join Date
    Nov 2011
    Central Illinois


    Quote Originally Posted by Rodz View Post
    2004 silverado - hot air blows out of driver side vents, pass side stays cold. Restart the truck, it returns to normal.
    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:
    2012 Silverado 1500 LT 4X4
    2003 Suburban LT 2500 6.0L
    2004 2500HD Crew Cab LT 4x4 6.0L - SOLD

  8. #8


    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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