Engine-CodesGMC – C111A 2015 GMC Sierra

C111A 2015 GMC Sierra Code - Trailer Brake Power Control Module

Quick Answer

The C111A code on a 2015 GMC Sierra indicates an issue with the Trailer Brake Power Control Module. Common causes include Faulty Trailer Brake Power Control Module, Wiring harness issues or shorts, Corrosion or damage to electrical connections. 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
C111A 2015 GMC Sierra indicates Trailer Brake Power Control Module.
Common causes
Common causes include Faulty Trailer Brake Power Control Module, Wiring harness issues or shorts, Corrosion or damage to electrical connections.
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.
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code C111A 2015 GMC Sierra Description

The C111A code on a 2015 GMC Sierra indicates an issue with the Trailer Brake Power Control Module. This module is responsible for controlling the power supply to the trailer brakes, ensuring smooth and efficient braking while towing. When this module malfunctions, it can lead to various issues affecting the trailer braking system, potentially compromising the safety and performance of the vehicle.

OBDII Code C111A 2015 GMC Sierra - Trailer Brake Power Control Module
C111A 2015 GMC Sierra Code - Trailer Brake Power Control Module

Common Causes of C111A 2015 GMC Sierra

  1. Faulty Trailer Brake Power Control Module
  2. Wiring harness issues or shorts
  3. Corrosion or damage to electrical connections
  4. Water intrusion into the module
  5. Overloading of the trailer causing excessive strain on the braking system

Symptoms of C111A 2015 GMC Sierra

  1. Inoperative trailer brakes
  2. Erratic trailer brake performance
  3. Illuminated trailer brake warning light on the dashboard
  4. Loss of trailer brake control while towing
  5. ABS system malfunction

How to Fix C111A 2015 GMC Sierra

  1. Begin by conducting a thorough diagnostic scan to confirm the C111A code and pinpoint the exact issue with the Trailer Brake Power Control Module.
  2. Inspect the wiring harness and electrical connections for any signs of damage, corrosion, or shorts. Repair or replace as necessary.
  3. Check for water intrusion into the module and address any leaks or sealant issues.
  4. If the module is found to be faulty, replace it with a new one following manufacturer guidelines.
  5. Clear the diagnostic trouble codes and test the trailer brake system to ensure proper functionality.

Cost to Fix C111A 2015 GMC Sierra

The typical repair costs for addressing the C111A code related to the Trailer Brake Power Control Module on a 2015 GMC Sierra can range from $200 to $600, including parts and labor. However, it's important to note that actual costs may vary depending on the specific diagnosis time, labor rates, and the extent of the repairs needed. Factors such as location, vehicle make and model, and engine type can also influence the overall repair expenses. It's recommended to consult with a qualified mechanic or auto repair shop to obtain a more accurate estimate based on the individual circumstances.

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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 C111A 2015 GMC Sierra Code

1. What does OBDII code C111A indicate in a 2015 GMC Sierra related to the Trailer Brake Power Control Module?

- OBDII code C111A in a 2015 GMC Sierra typically points to a fault in the Trailer Brake Power Control Module.

2. What are common symptoms of OBDII code C111A in a 2015 GMC Sierra?

- Common symptoms of OBDII code C111A may include trailer brake system malfunctions, warning lights on the dashboard, and issues with trailer brake control.

3. What are possible causes of OBDII code C111A in a 2015 GMC Sierra?

- Possible causes of OBDII code C111A in a 2015 GMC Sierra include damaged wiring, faulty trailer brake power control module, or issues with the trailer brake system components.

4. How can I diagnose the cause of OBDII code C111A in my 2015 GMC Sierra?

- To diagnose OBDII code C111A, it is recommended to perform a thorough inspection of the trailer brake system wiring, connections, and components. Using a diagnostic scan tool can help pinpoint the exact cause.

5. Can OBDII code C111A in a 2015 GMC Sierra be repaired at home?

- Depending on the exact cause, repairing OBDII code C111A in a 2015 GMC Sierra may be possible at home if you have the necessary tools and expertise. However, complex electrical issues may require professional assistance.

6. Is it safe to drive my 2015 GMC Sierra with OBDII code C111A active?

- It is not recommended to drive your 2015 GMC Sierra with OBDII code C111A active, as it indicates a fault in the trailer brake power control module, which can affect the trailer brake system's functionality.

7. How much does it typically cost to repair OBDII code C111A in a 2015 GMC Sierra?

- The cost to repair OBDII code C111A in a 2015 GMC Sierra can vary depending on the exact cause of the issue. It is advisable to consult a professional mechanic for an accurate estimate.

8. Can resetting the OBDII system clear OBDII code C111A in a 2015 GMC Sierra?

- Resetting the OBDII system may temporarily clear OBDII code C111A in a 2015 GMC Sierra, but if the underlying issue is not addressed, the code is likely to return.

9. Are there any recalls related to OBDII code C111A in 2015 GMC Sierra models?

- It is advisable to check with the manufacturer or authorized dealerships to inquire about any recalls related to OBDII code C111A in 2015 GMC Sierra models.

10. How can I prevent OBDII code C111A from occurring in my 2015 GMC Sierra in the future?

- To prevent OBDII code C111A from occurring in the future, it is essential to properly maintain the trailer brake system, regularly inspect wiring and connections, and address any issues promptly.

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