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trailer brakes

  1. Integrated Brake controller question

    11-16 LML Duramax Powertrain
    In my 2013 3500HD,new to me last fall, while pulling my new 2020 5th wheel weighing about 12 K with Electric Brakes, when the brakes are applied hard the IBC controller maxes out to a gain of 10 but it doesn't seem to have allot of stopping power coming from the trailer ( some but not allot)...