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I have a 2004 chevy silverado 1500,and when all my switches are all turned off ac heater defroster inside there is hot air still coming out of my vents inside the truck and I have the vents all shut off from the vents part inside what causes hot air to still come through vents

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There is a diverter door in the heater box that allows outside air to enter the cab this door can stick open when you change from defrost to ac you should hear this door flip directions

Posted on May 10, 2014

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I have a 2002 silverado 1500 heater & ac work fine, but hardly any air coming out vents.


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