Rearview mirror temp and compass intermittently begins flashing gibberish

admartinadmartin Member Posts: 1
edited March 2017 in Chevrolet
The temperature and compass LED on my 2003 Tahoe rearview mirror intermittently begins flashing gibberish. This happens when the mirror is exposed to direct sunlight and the back of the mirror becomes very warm to touch. The rear of the mirror temperature also gets quite warm even when driving at night, but the compass/temp work. OnStar works when the temp and compass display is malfunctioning.
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  • casper30xcasper30x Member Posts: 1
    I have the same problem, I have noticed that it happen when 35 degrees or colder. Does any one know a fix for this problem. I don't want to replace the mirror and find out it may be another problem, a new mirror run around 380.00
  • jasondubjasondub Member Posts: 1
    My 2008 Tahoe LTZ displays the compass, but not the temperature. It displays OC where the temperature should be. 
    Many ideas on a fix? I suspect that it was in a crash that wasn’t reported because the headlights are out of whack and the bolts on the battery side of the fender were painted. 
  • imidazol97imidazol97 Member Posts: 27,512
    edited May 2018
    The ambient temperature sensor may have been damaged. Or the cable damaged or not reconnected after body work.
    I don't remember what it should do but removing the connector should have a specified effect on the temperature the system reads with no sensor.

    This diagram may help you find the location of the ambient temperature sensor AND it's cable. Check the connector for corrosion.



    #4 and #3 in diagram.

    AC Delco part number is

    ACDELCO 2134190

    If you need the sensor, these are vehicles which use the same piece
    that are in the pick n pull yards...

    CADILLAC ESCALADE
    2007-2014

    CHEVROLET AVALANCHE
    2007-2013
    CHEVROLET CAPTIVA SPORT
    2012-2015
    CHEVROLET EXPRESS 1500
    2008-2014
    CHEVROLET EXPRESS 2500
    2008-2018
    CHEVROLET EXPRESS 3500
    2008-2018
    CHEVROLET EXPRESS 4500
    2009-2015
    CHEVROLET SUBURBAN 1500
    2007-2014
    CHEVROLET SUBURBAN 2500
    2007-2013
    CHEVROLET TAHOE
    2007-2014

    GMC SAVANA 1500
    2008-2014
    GMC SAVANA 2500
    2008-2018
    GMC SAVANA 3500
    2008-2018
    GMC SAVANA 4500
    2009-2015
    GMC YUKON
    2007-2014
    GMC YUKON XL 1500
    2007-2014
    GMC YUKON XL 2500
    2007-2013

    SATURN
    VUE 2008-2010

    Good luck. Hope this info leads to the problem source.

    2014 Malibu 2LT, 2015 Cruze 2LT,

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