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17 Silverao rear window defogger comes on automatically when cold

mtkawboy

By mtkawboy
in Troubleshooting & Recalls

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mtkawboy Enthusiast

mtkawboy

Posted
Posted

I dont know if this is normal or not but on my 17 Silverado crew cab the rear window defogger comes on automatically when I cold start it in the AM when its cold out and the truck is in the garage. Its not that big of a deal, I look for it now & shut it off but was wondering if there is a way to disable this so its strictly manual turn on. Ill will check the temps that it comes on in the future but id say when the temperature at least in the high 20s

mtkawboy Enthusiast

mtkawboy

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  • Author
Posted

Ill give it a try and let you know how it comes out, thanks. It must have been set that way from the factory because I havent messed with it

CamGTP Senior Enthusiast

CamGTP

Posted
Posted

It won't disable if you use your remote start though.

 

I set my truck to disable it when I start it but that only works if I use my keys. If I remote start the truck on the driveway, the re-defogger will turn itself on no matter what.

 

I believe anything under about 32-35 it will turn itself on.

mtkawboy Enthusiast

mtkawboy

Posted
  • Author
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i dont use the remote start anyway but thanks. Ill try to find time to reset it today

  • 4 weeks later...
NCPGMC Enthusiast

NCPGMC

Posted
Posted
On 3/31/2019 at 8:59 PM, CamGTP said:

It won't disable if you use your remote start though.

 

I set my truck to disable it when I start it but that only works if I use my keys. If I remote start the truck on the driveway, the re-defogger will turn itself on no matter what.

 

I believe anything under about 32-35 it will turn itself on.

That is correct...even though you set it to not come on, it still does...There is much speculation about this feature causing the rear window blow-out issue....I pulled the fuse on mine to avoid it coming on until there is a fix identified...

 

 

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