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Thread: Vents dont work

  1. #1

    Default Vents dont work

    MYac blows onlt threw the defroster vents and when i switch the knob it doesnt do anything just wondering what could be wrong i have a 04 Silverado

  2. #2


    Welcome to the club!

    The problem likely that the valve is not moving properly. My question is when u put it on feet does it blow at the feet?

    1996 Chevy Tahoe LT 5.7L V8 4X4 205,000+ miles. Built proudly at Janesville Assembly in Janesville, Wisconsin
    Basic mods: Lights all over, bunch of electrical work, and a couple cooling mods.

    Check out my other mods in My Garage:

  3. #3


    Could also be the mode door actuator...

  4. #4


    no it doesent blow on the feet either just the defroster vents

  5. #5


    Well I'd look and see if the blower control motor is actually moving the linkage. do that by having truck on/in accessory position so air blows and play with the directional control and watch if the motor moves the linkage and such.

  6. #6


    There was a non-recall issue that GM would fix for free even on out-of-warranty cars, where moisture could get in and damage some of the blower control circuitry. Some of the symptoms are similar, so you might want to get it checked out at a dealer. The 04 Silverado I used to have had the issue, and they did the repair for no charge. I don't recall the TSB number though.

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