Trailer Brake System

Discussion in 'Technical Discussions' started by mhoff1993, Jun 5, 2018.

  1. mhoff1993

    mhoff1993 New Member

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    Westfield, MA
    I have a 2009 Tahoe LTZ with 110k miles. The "Service Trailer Brake System" msg came on. I researched a solution on-line and find I need to replace the Trailer Brake Relay and a fuse. I did that but the msg is still there. What do I need to do to fix this problem?