Mildew smell in A/C upon start-up

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EGSJR

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Have an '07 Yukon XL, 9000 miles. Began to notice a mildew type smell coming from A/C after it had been parked for a while. Think the dealer resolved it today, told there is a bulletin on it. Has anyone else had a similiar problem? I am going to see what it does over the next few days, if problem is corrected, will post the cure so if anyone else does have it.
 

07tahoe

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Mine has the same problem happens more on really hot days. Let us know if the fix worked.
 

EGSJR

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Mildew smell in A/C upon start-up.

It appears to be fixed. There are GM bulletins out on the problem, as the dealer showed them to me.
Two Phases of the repair.
1. There is a cleaning kit that GM sends that cleans the ducts.
2. There is a computer controlled fan in the system that is supposed to dry out the ducts after the engine is shut off. Apparantly, some are not programmed correctly, as mine was not activating. After cleaning, re-programmed the fan and the problem appears to be solved.
Hope this helps anyone with a similiar problem.
 
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