AutoCodes – GMC – U0137 2014 GMC Sierra

U0137 2014 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 2014 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.

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Code Popularity 217

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 21, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0137 2014 GMC Sierra Description

Modules connected to the high-speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. The modules have prerecorded information about what messages need to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver module as an availability indication of the transmitter module. The supervision time-out period is 250 ms. Each message contains the identification number of the transmitter module. The Diagnostic Trouble Code (DTC) will be set when the device setting the DTC has attempted to establish communications on the serial data circuits more than 3 times in 5 s.

OBDII Code U0137 2014 GMC Sierra - Lost Communication with Trailer Brake Control Module - AutoCodes.com — U0137 2014 GMC Sierra Code - Lost Communication with Trailer Brake Control Module

What does this mean?

What are the Possible Causes of the DTC U0137 2014 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 2014 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 2014 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.

Need more information about the U0137 2014 GMC Sierra code?

Need more information on how to fix the U0137 2014 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about U0137 2014 GMC Sierra Code

1. What does OBDII code U0137 mean for my 2014 GMC Sierra?

- This code indicates a communication problem between the vehicle's onboard computer system and the Trailer Brake Control Module.

2. What are the common symptoms of U0137 code in a 2014 GMC Sierra?

- Common symptoms include the trailer brakes not functioning properly, the trailer brake warning light illuminating on the dashboard, and potential issues with the trailer brake system.

3. What are the possible causes of the U0137 code in a 2014 GMC Sierra?

- The U0137 code may be caused by damaged wiring or connectors, a faulty Trailer Brake Control Module, a software glitch, or a problem with the vehicle's onboard computer system.

4. How can I diagnose the U0137 code in my 2014 GMC Sierra?

- Diagnosing the U0137 code typically involves using a professional OBDII scanner to retrieve the code, checking the trailer brake system for any visible damage, and inspecting the wiring and connectors for any issues.

5. Can I still drive my 2014 GMC Sierra with the U0137 code present?

- It is not recommended to drive with the U0137 code present, as it can affect the proper functioning of the trailer brake system and compromise safety while towing.

6. How can I repair the U0137 code in my 2014 GMC Sierra?

- Repairing the U0137 code may involve fixing or replacing damaged wiring or connectors, replacing the Trailer Brake Control Module if necessary, and clearing the code from the vehicle's system.

7. Are there any DIY tips for resolving the U0137 code in a 2014 GMC Sierra?

- DIY tips include checking for loose or damaged wiring, ensuring all connectors are securely attached, and consulting the vehicle's manual for specific troubleshooting steps.

8. Is it necessary to visit a mechanic for the U0137 code in my 2014 GMC Sierra?

- While some DIY troubleshooting is possible, it is recommended to seek professional help from a mechanic or dealership to accurately diagnose and repair the U0137 code to ensure proper functioning of the trailer brake system.

9. How much does it typically cost to fix the U0137 code in a 2014 GMC Sierra?

- The cost of fixing the U0137 code can vary depending on the underlying cause, but it may involve expenses for parts replacement, labor costs, and diagnostic fees from a mechanic or dealership.

10. Can the U0137 code in a 2014 GMC Sierra reoccur after being repaired?

- The U0137 code can reoccur if the root cause of the communication issue is not fully addressed during the repair process, highlighting the importance of thorough diagnosis and proper repairs.