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Thread: Tar like substance and driver side window

  1. #1

    Default Tar like substance and driver side window

    I have a 2012 grand sport convertible tar like substance and drivers window clean it with a razor blade use the window and it came back

  2. #2
    Join Date
    Dec 2011
    New Haven, Ct


    HI there,

    There is probably something rubbing on the inside of the window guide. You will have to remove the drivers door panel to see what is rubbing on the glass.

    We have seen the inner guides sometimes cause this. Look towards the top of the window in the door assembly.

    Allthebest, Paul
    GM World Class Certified Service Technician.
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