Question about 2002 Chevrolet Silverado 2500HD
The actuator vent unit may have gone bad, you can try reseting it by removing the fuse to the HAVC system under the hood and in the side of the dash. Place the fuse back in after 2 min and hope it will reset the actuator to have it work properly again.
Most likely the plastic gears in the actuators have gone bad and the unit will need to be replaced.
Thank you for using fixya and Auto Zone will have the part you need and the step by step instructions to get the job done with common tools.
Posted on Jun 02, 2010
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Posted on Jan 02, 2017
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