2015 Silverado 2500 HD 6.0 Service Trailer Brake Problem/Solution

I've had an intermittent Service Trailer Brake System warning for years. Lately it was almost constant. I unplugged the dash control switch to keep it from annoying me until I could replace the trailer brake control module. Its located under the spare tire and is pretty easy to access and replace. Here is a quick video of the process. Replacing the module fixed my issue but there are other system problems that can cause the same warning. So far mine works as it should.

[@BeauBrooks-w4r]

What code was it giving

[@StoutCustom]

@@BeauBrooks-w4r no codes. Just intermittently giving the service trailer brake system messsge. Changing the control module seemed to have worked for a while but it just started doing it again.

[@jreedsac1]

You're fast!

[@StoutCustom]

@@jreedsac1 It’s gotta go, customer’s in the office

[@jimbennett1519]

👍👍👍🏻

[@chino7665]

Did it come up every time you pressed the brakes?

[@StoutCustom]

@@chino7665 sometimes with the brake but pretty much just random

[@gmctx5487]

What a pain.🍺

[@scottraper9574]

I hate that spare tire operation.

[@StoutCustom]

@@scottraper9574 it’s not too bad as long as everything cooperates

[@robertlambert5299]

I have a 2011 2500 HD diesel. It displayed the same message. I changed the module and it lasted a while. It Did it again years later was almost every time I started it. Had some mechanical work done and it hasn’t done it since. And I didn’t replace it.

[@StoutCustom]

@@robertlambert5299 I’ve read several things can cause it. Corrosion in the plug, defective harness, module, control switch..etc. we will see if it lasts

[@robertlambert5299]

@@StoutCustom next time mine happens. I will look at the plug closely.

[@BeauBrooks-w4r]

I had one do it and a wire was burnt inside the plug