Automatic Dimming Mirrors
11-11-2014, 10:32 AM
#1
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Automatic Dimming Mirrors
How do you turn off the automatic dimming mirror feature on a 2014 C7? When I drive at night on a highway all that I see is a black screen and headlights. This makes a lane change difficult.
11-11-2014, 10:46 AM
#2
Instructor
The mirror glass can be removed from the painted cover - just take your fingers behind the glass and pull it lose. It is held with 4 snap-on plastic claws. Once removed, disconnect the 2 wire connector behind the glass (not the two slip-on connectors for the heated mirror) and your dimming function is disconnected. I did that myself as I did not like it either.
Good luck - no failure codes or issues disconnecting the connector behind the mirror
Good luck - no failure codes or issues disconnecting the connector behind the mirror
11-12-2014, 10:53 AM
#5
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St. Jude Donor '15
"In honor of jpee"
Don't know. On some cars there is a button on the interior (rearview) mirror that turns auto dim on and off, but only for that mirror. I don't even recall it in the C6. See what the PDF for the owner's manual says, or someone on here might know.
11-12-2014, 11:54 AM
#7
Instructor
Rick,
Could you please let me know how it goes. Bit nervous about tugging on the glass, be great if you could take a picture once the glass is removed from the cover so we can see what we are working with.
Thanks!
Could you please let me know how it goes. Bit nervous about tugging on the glass, be great if you could take a picture once the glass is removed from the cover so we can see what we are working with.
Thanks!
11-12-2014, 12:39 PM
#8
There is no button to turn off this feature, but there is a sensor in the rearview mirror that controls both rearview and DS mirror.
Rather than pull it apart and disable it "permanently", I put a black dot made from a label that I Sharpied black. I used a hole punch to make a small circle. The third picture shows the location of the sensor covered with the black dot.
This took 5 minutes, and the beauty is that if some idiot is riding your tail blasting you with his brights, you still have the option of a dimming mirror by just pulling the dot off.
Rather than pull it apart and disable it "permanently", I put a black dot made from a label that I Sharpied black. I used a hole punch to make a small circle. The third picture shows the location of the sensor covered with the black dot.
This took 5 minutes, and the beauty is that if some idiot is riding your tail blasting you with his brights, you still have the option of a dimming mirror by just pulling the dot off.
11-12-2014, 12:42 PM
#9
Instructor
There is no button to turn off this feature, but there is a sensor in the rearview mirror that controls both rearview and DS mirror.
Rather than pull it apart and disable it "permanently", I put a black dot made from a label that I Sharpied black. I used a hole punch to make a small circle. The third picture shows the location of the sensor covered with the black dot.
This took 5 minutes, and the beauty is that if some idiot is riding your tail blasting you with his brights, you still have the option of a dimming mirror by just pulling the dot off.
Rather than pull it apart and disable it "permanently", I put a black dot made from a label that I Sharpied black. I used a hole punch to make a small circle. The third picture shows the location of the sensor covered with the black dot.
This took 5 minutes, and the beauty is that if some idiot is riding your tail blasting you with his brights, you still have the option of a dimming mirror by just pulling the dot off.
Not the rear-view mirror - talking about taking apart the side mirrors and disconnecting the wires...
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11-12-2014, 12:51 PM
#10
Good luck, I hope it's doable simply and safely.
11-12-2014, 12:59 PM
#11
Instructor
Perfect, thanks!
11-12-2014, 03:58 PM
#12
Melting Slicks
C6 does have the feature to turn it off. You have to hold one of the buttons on the rearview mirror. To bad the C7 doesn't have it.
11-12-2014, 06:59 PM
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St. Jude Donor '15
"In honor of jpee"
Thanks, Bill. I'll have to go try it sometime soon. 
11-13-2014, 01:09 PM
#14
Pro
I wonder why they didn't leave it as an option like the C6.
I wish the button on my C6 would only turn them "ON". It defaults to "ON" upon start up. I'm always turning it off before I take off.
I only use it on occasion on a road-trip or if I'm getting blinded from behind.
Last edited by Cratchet; 11-13-2014 at 01:10 PM. Reason: spelling
11-13-2014, 02:08 PM
#15
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There is no button to turn off this feature, but there is a sensor in the rearview mirror that controls both rearview and DS mirror.
Rather than pull it apart and disable it "permanently", I put a black dot made from a label that I Sharpied black. I used a hole punch to make a small circle. The third picture shows the location of the sensor covered with the black dot.
This took 5 minutes, and the beauty is that if some idiot is riding your tail blasting you with his brights, you still have the option of a dimming mirror by just pulling the dot off.
Rather than pull it apart and disable it "permanently", I put a black dot made from a label that I Sharpied black. I used a hole punch to make a small circle. The third picture shows the location of the sensor covered with the black dot.
This took 5 minutes, and the beauty is that if some idiot is riding your tail blasting you with his brights, you still have the option of a dimming mirror by just pulling the dot off.
Great solution. I was able to find the sensor by angling a flash light on the mirror in my garage. Do you know what the sensor is registering? Is it headlights behind the car?
11-13-2014, 02:34 PM
#16
My pics are when the car was in a dark garage with the garage door open on a sunny day, so it will dim even with out headlights (in the rear) being a factor.
02-06-2015, 01:27 PM
#17
Racer
There is no button to turn off this feature, but there is a sensor in the rearview mirror that controls both rearview and DS mirror.
Rather than pull it apart and disable it "permanently", I put a black dot made from a label that I Sharpied black. I used a hole punch to make a small circle. The third picture shows the location of the sensor covered with the black dot.
This took 5 minutes, and the beauty is that if some idiot is riding your tail blasting you with his brights, you still have the option of a dimming mirror by just pulling the dot off.
Rather than pull it apart and disable it "permanently", I put a black dot made from a label that I Sharpied black. I used a hole punch to make a small circle. The third picture shows the location of the sensor covered with the black dot.
This took 5 minutes, and the beauty is that if some idiot is riding your tail blasting you with his brights, you still have the option of a dimming mirror by just pulling the dot off.
Jim
02-07-2015, 03:36 PM
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Dimming mirror with top off
The issue I found yesterday with the AutoDim was when I took off the the top for a nice early morning drive. The early morning twilight, with the sun rising behind you and it is still dark enough that the headlights are on, the mirror turned black. The same issue happens in the evening and this becomes not just an annoyance, but a danger. I suppose some one will now say "put the top back on". I guess I will have to discuss the issue with GM but I doubt anything will come of it. I wonder if the convertibles have the same problem?