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RSTEF655

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  1. RSTEF655
    SERVICE TRAILER BRAKE SYSTEM MESSAGE APPEARS AS SOON AS IGNITION IS TURNED ON I HAVE A U1556 CODE I REMOVED SPARE TIRE AND INSPECTED THE TBCM & HARNESS. THERE IS A BULLETIN. NO PROBLEMS FOUND I REPLACED THE TRAILER BRAKE CONTROL MODULE(AC DELCO),7 WAYHARNESS AND TRAILER PLUG STILL HAVE SAME ISSUE ANY HELP WOULD BE APPRECIATED THANK YOU
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