[6Sixathome]

I've smelled that before too, I also shut the air off a little bit before I get stopped, my wife on the other hand shuts it off right before she turnes off the key :.

 

[6Sixathome]

I had the same foul odor problem a while back while Saturn dealers still existed.

While still under warranty, I took the car in and the service tech made a software change to make the moisture detector built into our cars turn on the AC/heater blowers when moisture is detected after the engine is shut off. I would sometimes return after a short period to find the blowers just "blowin' their hearts out". Worked fine for a while but eventually the blowers would run so long that the battery went dead. Took a look for pinched AC drain lines and sure enough found one so the CORRECT fix was a pinched drain line and not a software change.

Now out of warranty but with extended warranty, I returned to the Saturn Authorized Service center (Chevy dealer) to have the software returned to factory specs to save my newly purchased battery ($165), learning that a fix to fix a GM techs' incorrect fix would cost me shop fees and supplies. :angryfire: Extended warranty is drive train only.

Bottom line: Don't let them do the software mod unless you are ready to replace your battery more often.

I remember my '07 OUTLOOK doing this a few times (blowers going with the key off) but never in my '09.

 

[6Sixathome]

here you go.

Intermittent Battery Draw, Dead Battery or HVAC Odor
May 1, 2011 9:42 PM
On some 2007-2010 OUTLOOK; 2008-2011 Enclave; 2009-2011 Traverse; and 2007-2011 Acadia, Silverado, Avalanche, Suburban, Tahoe, Sierra, Yukon, Yukon Denali, and Escalade models, an intermittent no crank condition may be found due to a dead battery.


A recent Engineering study has shown that the vehicles identified above could experience a dead battery as a result of the HVAC afterblow function being turned on at the dealership (refer to Service Information document 1865501).


The afterblow calibration may cause the blower motor to operate in a series of operating cycles which, over time, may cause the battery to drain. This is more likely to occur if the vehicle is not driven long enough between ignition cycles to maintain a sufficient battery state of charge.


Until further notice, it is recommended that the afterblow feature not be enabled, to prevent the potential of a dead battery. Also disable the afterblow feature if a vehicle has an intermittent dead battery condition that cannot be duplicated.

Good find :thumb:

 

[6Sixathome]

A shot of lysol into the cowl area while you have the fan running on high in the passenger compartment will help. So long as the system pulls in a percentage of fresh air from outside, the lysol will get sucked in as well and make its way over the ductwork and core/coils. I get this only at certain points in the year, even at that, not regularly. Most noticeable is the first time turning the A/C on in the spring or summer.

I get that smell too, the Lysol in the cowl area is a great idea :thumb: