I keep having Service trailer Brake system alert on 2017 Sierra 2017. I have replaced the module under spare tire and 30 Mechanic's Assistant chat Customer: I keep receiving a "Service …

I have a 2020 gmc Sierra 1500 at4 with a service trailer brake system message Mechanic's Assistant chat Customer: I have a 2020 vehicle with a service trailer brake system message.

The warning appears due to the truck’s trailer brake controller detecting a fault or open circuit in the trailer plug wiring. Inspect the 7-pin trailer connector for corrosion, bent pins, or damaged …

To service the trailer brake system, inspect the brake controller, wiring harness, and trailer connectors for damage or corrosion. Test the brake magnets and drums for wear or sticking.

The 'Service Trailer Brake System' warning can stem from faulty wheel speed sensors, ABS module faults, or trailer wiring issues. Start by inspecting the trailer connector for corrosion or …

Customer: I have a 2009 GMC 2500 with a factory-integrated trailer brake system. I received a "service trailer brake" message and discovered that the plug at the back of the truck was filled …

Customer: service trailer system message GMC Sierra's trailer brake system Mechanic's Assistant: Is the brake warning light blinking or flashing, or is it solid? When did you first notice …

2007 GMC Sierra Duramax "service trailer brake system" message persists. Message comes on when truck starts, stays on Mechanic's Assistant chat Customer: "Service trailer brake system" …

Customer: The light indicating the service trailer brake system keeps appearing on the dashboard, and I have never used the trailer brake feature. Mechanic's Assistant: I understand that you're …

I have changed the brake module, wiring harness from module to bumper, and the plug at bumper. Mechanic's Assistant: I understand you're seeing a "Service Trailer Brake System" …