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Condesation In Cab

DTyrrell

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DTyrrell Enthusiast

DTyrrell

Posted
Posted

I did a search, couldn't find anything.

 

This is my first winter with the new truck. It's a 2010 GMC Sierra 1500 Extended cab standard box. I love the truck but now the cold is here I find I am getting condesation inside the truck...now I know fog is normal, but it doesn't go away. And it's very very moist. I've even tried drying the windows with a towel and it still comes back. The front windows aren't so bad, eventually the air gets rid of the majority of it (though I still have to occasionaly wipe the window down with a towel) but the back window, and the side back windows are just perma foggy/moist.

 

I never had this problem with any other vehicle I've driven, fog when I start, but it all goes away after 30 min or so. Not with the Sierra! It's extremely frustrating.

 

My dad seems to think it means there is a problem with my trucks seal. I don't know if anyone noticed, but on the back of the cab on the sides of the back window there are two little strips of weatherstripping. I had one of them disappear. I did go a few months before I got it replaced by the dealer (I didn't notice it was gone) now it was warm while it wasn't there but it did rain a lot, could this be another part of the problem?

SouthCo Senior Enthusiast

SouthCo

Posted
Posted

Mine is a 2010 too and I have not noticed any interior moisture. Even with past vehicles, I have only had interior moisture if I forgot and had left a window cracked on a cold night. Let the dealer deal with it.

cerbomark Senior Enthusiast

cerbomark

Posted
Posted

make sure you have no water leaking into the cab. Check all the floors, front and rear, behind seat etc.. Also the headliner. Sometimes if you have water leaking into the cab it will result in all the moisture you are refering to. Is it garaged?

Crazy Canuck Enthusiast

Crazy Canuck

Posted
Posted
Agreed. Your truck is filling up with water and the water is not evaporating.

 

Get to the dealer right away.

 

 

x2 I had a buddy whos AC drain line came lose on his yota and the water dripping into the vehicle from that cause the same issue you are referring too. You have water getting in from somewhere, either that or you are breathing too hard.

pjp Enthusiast

pjp

Posted
Posted

Check under your carpets in front. Mine had a seam leak and the jute pad was getting soaked...

  • 1 month later...
fox441 New Member

fox441

Posted
Posted

Hi i had the same problem in my 2010 sierra and it seems that it is the trap for the recirculating air from outside that is stuck in the closed position, what they did at the dealer is open the trap for now and disconnect the motor for that door the next step when the engineers from GMC has the answer is to do a software update on the heating sytem

For now after a weekend i do not have any fog in the windows anymore so it seems that it is working

There will probably be a recall or something on this

 

Hope it helps

brianf60 Enthusiast

brianf60

Posted
Posted
Try running the AC on warm or the defrost

 

 

The A/C wont come on in the new trucks if the temp outside is below freezing. I hate that feature on my 2011. It tends to fog up more then normal. There is no leaks, but any snow that comes in from your boots causes this...

Rolling Enthusiast

Rolling

Posted
Posted

You need to make sure your heater is not stuck on recirculate. It really needs to be on fresh air inlet to keep moisture from building up inside. A little birdie tells me there is a technical review of 10s and 11s having a problem sticking on recirc and causing massive condensation problems. They dont have a repair yet just to physically move the door from recirc and not switch to it again

tonygxp Enthusiast

tonygxp

Posted
Posted

water leak for sure, check behind the passenger side front carpet, peel it back. my '08 all terrain was leaking there and the passenger from door seal. it got fixed but it was a nightmare for a while before they figured it out.

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