Jump to content
  • Sign up for FREE! Become a GM-Trucks.com Member Today!

    In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. From buying research to owner support, join 1.5 MILLION GM Truck Enthusiasts every month who use GM-Trucks.com as a daily part of their ownership experience. 

2021 Sierra AT4 - heated mirrors?


Recommended Posts

Window sticker on my truck says it should have heated mirrors.  Now that weather is turning, I am questioning whether it actually does.  I don't see the marking on the actual side mirror and don't see the results with defrost running.  Wondering if this is a chip supply chain issue surprise.  Haven't had a vehicle in at least 20 years without that feature.

 

Can anyone who has this feature confirm whether there is a marking on the mirror itself?  How else could I confirm since it is not clearing moisture quickly?

Link to comment
Share on other sites

They should come on with the rear window defroster. (button labelled 'rear', at the 7 o'clock position)

 

I'm not aware of any markings on mirrors (but also not sure that there isn't a way to tell)

 

As you are aware, heated mirrors are standard on most trims (available, but not standard on Base sierra and on WT)

 

On tow mirrors, only the upper glass is heated. 

 

 

image.thumb.png.0ba6404de32454a52ca8b175f78eaaab.png

 

 

 

If you have a temp gun it might be able to help diagnose.

Edited by redwngr
  • Like 1
Link to comment
Share on other sites

Thanks for the replies.  I did check the manual and understand aligned with rear defrost.  Maybe they are just not as responsive as I remember on my previous truck/vehicles.  Cold weather season is coming!  I'll get more tests soon.

Link to comment
Share on other sites

2 hours ago, GullLakeMi said:

Thanks for the replies.  I did check the manual and understand aligned with rear defrost.  Maybe they are just not as responsive as I remember on my previous truck/vehicles.  Cold weather season is coming!  I'll get more tests soon.

The Layman's way to test (have done it myself), is to turn them on when it starts getting cooler in the evening, early morning, and just breath on them. If they are working, you will see steam on the glass, then it should start to disappear from the heat generated by the mirror.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share



×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.