U0137 2017 GMC Sierra Code - Lost Communication with Trailer Brake Control Module
Quick Answer
Modules connected to the high-speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Trailer Brake Control Module, Trailer Brake Control Module harness is open or shorted, Trailer Brake Control Module circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- U0137 2017 GMC Sierra indicates Lost Communication with Trailer Brake Control Module.
- Common causes
- Common causes include Faulty Trailer Brake Control Module, Trailer Brake Control Module harness is open or shorted, Trailer Brake Control Module circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code U0137 2017 GMC Sierra Description
What are the Possible Causes of the DTC U0137 2017 GMC Sierra?
- Faulty Trailer Brake Control Module
- Trailer Brake Control Module harness is open or shorted
- Trailer Brake Control Module circuit poor electrical connection
How to Fix the DTC U0137 2017 GMC Sierra?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the U0137 2017 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about U0137 2017 GMC Sierra Code
1. What does the OBDII code U0137 mean on a 2017 GMC Sierra?
The U0137 code indicates a loss of communication with the Trailer Brake Control Module (TBCM) on the vehicle's communication network.
2. What are common symptoms of the U0137 code in a 2017 GMC Sierra?
Common symptoms include the trailer brake system not functioning, a warning message on the dashboard, and possibly inoperative trailer lights.
3. What causes the U0137 code on a 2017 GMC Sierra?
Potential causes include a faulty Trailer Brake Control Module, damaged or corroded wiring, loose connections, or issues with the CAN bus network.
4. Can I drive my 2017 GMC Sierra with the U0137 code?
Yes, you can drive the vehicle, but the trailer brake system may not work, which is unsafe if towing a trailer.
5. How do you troubleshoot the U0137 code on a 2017 GMC Sierra?
Start by inspecting the TBCM wiring and connectors for damage or corrosion, checking the CAN bus network for faults, and testing the TBCM for proper operation.
6. How much does it cost to fix the U0137 code on a 2017 GMC Sierra?
Repair costs vary but could range from $100 to $500 depending on whether the issue is a simple wiring repair or a module replacement.
7. Where is the Trailer Brake Control Module located on a 2017 GMC Sierra?
The TBCM is typically located under the dashboard near the driver’s side or behind the rear seat area, depending on the vehicle configuration.
8. Can a bad battery cause the U0137 code on a 2017 GMC Sierra?
A weak or failing battery can sometimes cause communication issues on the CAN bus, which may trigger the U0137 code.
9. Do I need to reprogram the Trailer Brake Control Module if I replace it?
Yes, a new TBCM may need to be programmed or initialized with a scan tool to function properly.
10. Will clearing the U0137 code fix the issue?
Clearing the code may temporarily remove the warning, but the issue will likely return unless the underlying problem is resolved.
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