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2009 Silverado Musty Smell

crowbar032

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crowbar032 Enthusiast

crowbar032

Posted
Posted

Hello all, I'm new here. I've had my 2009 Silverado 4x4 (not Z71) for 18 months not. Love the truck overall. However if it sits for a few days, there is a musty stale smell in the interior. I know your thinking "clean it out ya slob", but I keep my truck clean. There is no garbage and nothing has been spilled in it. I'm at a loss. Any thoughts would be very welcome. Thanks.

Wires Enthusiast

Wires

Posted
Posted
Hello all, I'm new here. I've had my 2009 Silverado 4x4 (not Z71) for 18 months not. Love the truck overall. However if it sits for a few days, there is a musty stale smell in the interior. I know your thinking "clean it out ya slob", but I keep my truck clean. There is no garbage and nothing has been spilled in it. I'm at a loss. Any thoughts would be very welcome. Thanks.

 

It sounds like water is not draining from the A/C condenser. Plugged drain? That will let water sit in there, and it goes stale/musty. After it runs for a bit, it'll be fine, but return once you park for a while.

gmercury Enthusiast

gmercury

Posted
Posted

How do you go about opening the drain plug if you have this problem? I dont have it on my current truck but have had it before on previous trucks!

txab Senior Enthusiast

txab

Posted
Posted
Go to your dealer and have them turn on the after blow function.

And check the drain and clean if necessary

Wires Enthusiast

Wires

Posted
Posted
Thanks for the info. I'll see if I can check the drain tonight otherwise it's time to call the dealer. I had never heard of an after blow function.

 

 

Me neither, but it probably turns the fan on to ensure the condenser is dry. My house A/C does this.

darkfox1 Senior Enthusiast

darkfox1

Posted
Posted

This is common among all gm vehicles. Thrre was a TSB related to it as it relates to all of them. You will find it most prevelant when using AC on max mode.

 

this is because of mildew build up inside the a/c duct system.

 

the fix prescribed by the TSB was not to run on max a/c. (which negates having max a/c if ya ask me..) but.. it worked in my corvette..

 

run the a/c without max a/c and allow the air ducts to dry out and remain dry and the mildew should die and the smell dissipate.

BigBlueLB756 Senior Enthusiast

BigBlueLB756

Posted
Posted

If you'll cut the air on High (not Max) and Recirculate and feed some Lysol Neutra Air into the air intake from the passenger side floorboard for about 15 seconds, that smell will be dead gone.

 

Don't use the "flowerdy" fragrance; your wife will think you've been hauling another woman around.

Diesail Enthusiast

Diesail

Posted
Posted

Lift the floor mats and check your carpet to see that it is dry. You might also think about pulling the door sills up and sticking your hand under the carpet and checking that it is dry, front and back on boths sides. Best to do this after a heavy rain as it sounds like you may have a water leak to me.

pjp Enthusiast

pjp

Posted
Posted

 

:D For checking under the carpet! My 2008 had a seam leak behind the dash/pedals and soaked the pad under the carpet. In fact it had been leaking for a couple of years and no rust but both foot wells were dripping wet.

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