Quote:
Originally Posted by posopete
The DIC (Driver Information Center) on my 2009 Duramax is displaying "Service Trailer Brake System". No doubt "something" is amiss. What is the most common cause of the message?
Dealer wants too much to diagnose the message. Thanks, Russ
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Found this on Google.
What does the “service trailer brake system” message mean? The “Service Trailer Brake System” message informs you that the trailer brake system has disengaged due to wiring issues or some other problem. The brake system may be hampered if the trailer being towed doesn't have enough power.
I'd start by checking the wiring. Do the trailer brakes engage when manually applied by the controller?
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Tony & Donna
2022 Montana HC, 295RL, Solar Flex 400, Onan 3600 LPG, 2K inverter, 200AH Lithium. 2020 GMC Denali 2500 6.6 Duramax, Demco 21K Auto Slide