2008 Yukon Denali - weird issue

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02Lightning

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The fan running after vehicle is shut off sounds like the afterblow function was enabled, which can only be done by a dealer or someone with a two-way diagnistic tool such as a Tech2.

There was a TSB about it. Have you ever taken it in due to a musty smell from the air vents?

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I have the musty smell from the air vents, is there a TSB? What is the fix?
 
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I have the musty smell from the air vents, is there a TSB? What is the fix?
Not sure of the TSB #, but the dealer enables the afterblow function on the HVAC system.

This will run the blower fan for a certain amount of time after the vehicle is shut off and had the AC on. It's to help dry up any condensation in the ductwork.

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02Lightning

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Not sure of the TSB #, but the dealer enables the afterblow function on the HVAC system.

This will run the blower fan for a certain amount of time after the vehicle is shut off and had the AC on. It's to help dry up any condensation in the ductwork.

Sent from my SM-G930V using Tapatalk
Cool, I'll have to look into that.
 

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