2011 Silverado Service Trailer Brake System

[Lazarus_Unknown]

I have a 2011 Silverado 2500HD 6.0. I have a Service Trailer Brake System light on & i’ve tried replacing the Relay, Control Module, All related fuses including the Stud 1 & Stud 2 fuses. Yet the Service Trailer Brake System light is still on. Does anyone have any more ideas of what I need to check? Note: All my trailer lights work. It’s only the Trailer Brake having issues. Thank you

Edited February 11, 2022 by Lazarus_Unknown

[dna9656]

Well do they operate? Is the fluid clean and is it fully serviced? Don't get frustrated and remove the warning bulb...

[swathdiver]

On 2/11/2022 at 5:17 PM, Lazarus_Unknown said:

I have a 2011 Silverado 2500HD 6.0. I have a Service Trailer Brake System light on & i’ve tried replacing the Relay, Control Module, All related fuses including the Stud 1 & Stud 2 fuses. Yet the Service Trailer Brake System light is still on. Does anyone have any more ideas of what I need to check? Note: All my trailer lights work. It’s only the Trailer Brake having issues. Thank you

You need to put a Tech-2 on it and pull the internal codes so you can stop wasting time and money.  The ITB module has to be programmed to the truck, it cannot just be installed.  The SSR (solid state relay) can be installed.  There's still the connection at the back to address, wiring and the controller.  Did anyone try hooking up an aftermarket controller?  If so, it will mess up the factory one, only one can be powered/attached at a time.

 

Have you taken apart the 7-pin and cleaned out all the dirt, dust and put dielectric grease on all the connections?

 

Mine was the SSR.