Quote:
Originally Posted by DWALEX
I think this mirror uses the Low Speed GMLAN serial data for auto-dimming. allowing it to compensate for the amount of light inside the vehicle like the display radio or Driver Information Center Display
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If it did this I would assume it would need to have a light sensor somewhere near the mirror but not in the mirror. My current mirror only dims itself at night when there is light glaring right into it so I'm assuming the 2013 mirror will work the same way.
I ordered one so I report back on what happens when I plug it in. I'm expecting the OnStar stuff wont work but I'm hoping the dimming bit still works.