Question about 2007 GMC Yukon XL Denali

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Problem with mildew odor through AC vents.

Hi,

I have a 2007 GMC Yukon XL and I'm getting a mildew odor from the AC vents. I had the exact same problem with a 2005 Avalanche that I owned before this truck. I'm sure it's coming from condensation in the vent system somewhere, but how can I eleminate it?


Thanks,
Barry

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Here is a video on how to fix the problem: http://youtu.be/yj-6n1CD9QI

Posted on May 27, 2014

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Well if you make sure the drain is open and working that is about all you can do except to take the vehicle to someone that can chemically clean the HVAC box and evaporator for you. I have also seen kits that you can purchase at one of the bigger autoparts chain stores.

Posted on Aug 02, 2010

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