U0137 2015 GMC Sierra Code - Lost Communication with Trailer Brake Control Module
Quick Answer
The U0137 diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates that there is a communication problem between the vehicle's onboard computer system and the Trailer Brake Control Module (TBCM). Common causes include Loose or corroded wiring connections between the vehicle's computer system and the TBCM, Faulty TBCM unit, Communication network issues within the vehicle. 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 2015 GMC Sierra indicates Lost Communication with Trailer Brake Control Module.
- Common causes
- Common causes include Loose or corroded wiring connections between the vehicle's computer system and the TBCM, Faulty TBCM unit, Communication network issues within the vehicle.
- 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.
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Code U0137 2015 GMC Sierra Description
The U0137 diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates that there is a communication problem between the vehicle's onboard computer system and the Trailer Brake Control Module (TBCM). The TBCM is responsible for controlling the trailer brakes when towing a trailer, ensuring that the trailer brakes function properly and in sync with the vehicle's brakes. When communication is lost with the TBCM, it can lead to issues with trailer brake operation, potentially compromising safety while towing.
Common Causes of U0137 2015 GMC Sierra
- Loose or corroded wiring connections between the vehicle's computer system and the TBCM
- Faulty TBCM unit
- Communication network issues within the vehicle
- Water damage or exposure to moisture affecting the TBCM
- Electrical system malfunctions within the vehicle
Symptoms of U0137 2015 GMC Sierra
- Dashboard warning lights related to the trailer brake system
- Inoperative trailer brakes while towing
- Uneven braking or delayed response when applying brakes while towing
- Loss of trailer brake control functionality
How to Fix U0137 2015 GMC Sierra
- Begin by inspecting the wiring connections between the vehicle's computer system and the TBCM for any signs of damage, corrosion, or loose connections. Repair or replace any damaged wiring as needed.
- Check the TBCM unit for proper functionality and communication with the vehicle's computer system. Replace the TBCM if it is found to be faulty.
- Perform a diagnostic scan of the vehicle's computer system to identify any communication network issues. Address any faults or malfunctions within the network.
- Test the trailer brake system to ensure proper operation and communication with the vehicle. Calibrate the system as necessary to restore functionality.
- Clear the DTC from the vehicle's computer system and test drive the vehicle to verify that the issue has been resolved.
Cost to Fix U0137 2015 GMC Sierra
The typical repair costs for addressing a U0137 code on a 2015 GMC Sierra can range from $200 to $500, depending on the specific cause of the communication loss with the TBCM. This estimate includes parts and labor, with the cost of a new TBCM unit potentially adding to the overall repair expenses. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for more accurate pricing information. Additionally, factors such as location, vehicle make and model, and engine type can influence repair costs.
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Frequently Asked Questions about U0137 2015 GMC Sierra Code
1. What does the OBDII code U0137 for a 2015 GMC Sierra mean?
The code U0137 indicates a "Lost Communication with Trailer Brake Control Module" error in the vehicle's diagnostic system.
2. What are common symptoms of a U0137 code in a 2015 GMC Sierra?
Common symptoms of a U0137 code may include non-functioning trailer brakes, disabled trailer brake control features, and possibly an illuminated warning light on the dashboard.
3. What are some possible causes of the U0137 code in a 2015 GMC Sierra?
Potential causes of a U0137 code include damaged wiring harnesses, faulty trailer brake control module, poor electrical connections, or a malfunctioning CAN bus communication system.
4. How can I diagnose a U0137 code in my 2015 GMC Sierra?
Diagnosing a U0137 code typically involves using an OBDII scanner to retrieve the code, checking the trailer brake control module for any visible damage, inspecting wiring for breaks or corrosion, and testing electrical connections for proper continuity.
5. How can I repair a U0137 code in my 2015 GMC Sierra?
Repairing a U0137 code may involve repairing or replacing damaged wiring, ensuring proper electrical connections, resetting the control module, or replacing the trailer brake control module if necessary.
6. Can I continue driving my 2015 GMC Sierra with a U0137 code?
It is not recommended to continue driving with a U0137 code, as it may affect the functionality of the trailer brake control system, leading to safety issues when towing a trailer.
7. Will a U0137 code in a 2015 GMC Sierra cause the vehicle to fail an emissions test?
The U0137 code itself is not related to emissions, so it should not cause the vehicle to fail an emissions test directly. However, it is important to address the code to ensure proper functioning of the trailer brake control system.
8. How much does it typically cost to repair a U0137 code in a 2015 GMC Sierra?
The cost of repairing a U0137 code can vary depending on the specific cause of the issue. It may range from a simple repair of wiring or connections to a more costly replacement of the trailer brake control module.
9. Can a U0137 code be triggered by DIY repairs or modifications to the trailer brake system?
Yes, DIY repairs or modifications to the trailer brake system can potentially trigger a U0137 code if the wiring or connections are not properly addressed or if there are compatibility issues with the control module.
10. Is a U0137 code a common issue in 2015 GMC Sierra vehicles?
The U0137 code related to lost communication with the trailer brake control module is not extremely common but can occur in 2015 GMC Sierra vehicles, especially in those used for towing trailers frequently.
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