Duramax Lifetime Supporter
Join Date: Oct 2016
Location: Maurice, LA
Feeling like I'm on the forum every other week.... Driving earlier today and had a Service Trailer Brake readout on DIC along with the BRAKE indicator light. Truck still driving no problem. Checked fluids all good. Seeing some stuff about a relay above rear end, then others about the switch itself. Just looking for some insight if anyone has had similar issues?? 2015 high country 4x4 LML. Thanks.
Try this first,
Disconnect harness from the rear of your 7 pin connector.
Blow out with air.
put Dielectric Grease in pin holes (to keep water out in the future) and reconnect.
If this does not work there is a Trailer Brake Controller above your rear axle on the inside of the drivers side frame.
Do the same process there too.
Let us know how this works out.
2008 Silverado 2500HD CCSB LTZ Diesel
FASS 95 Lift Pump (with Baldwin filters), Edge Insight CTS Monitor on a Windshield Mount, Nicktane Fuel Filter Adapter w/ CAT 306-9199 UHE tertiary fuel filter, Bilstein 5100 Stock Height, Bushwacker Bed Rail Caps, AMP Research Bedstep, Fumoto oil drain valve, Dorman PS Oil cooler, Pioneer AVIC 7200NEX GPS/Stereo, Air Lift LoadLifter 5000 Air Bags.