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Engine-Codes – GMC – U2504 GMC

U2504 GMC Code - Invalid Data Received From Trailer Brake Driver Control Module

Quick Answer

The U2504 GMC code indicates that the vehicle's onboard computer has detected invalid data being received from the Trailer Brake Driver Control Module. Common causes include Faulty Trailer Brake Driver Control Module, Wiring issues or shorts in the trailer brake system, Corrosion or damage to the CAN network 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
U2504 GMC indicates Invalid Data Received From Trailer Brake Driver Control Module.
Common causes
Common causes include Faulty Trailer Brake Driver Control Module, Wiring issues or shorts in the trailer brake system, Corrosion or damage to the CAN network 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.
What is this?
Table of contents Created and updated by William Orellana on Sep 16, 2024
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Code U2504 GMC Description

The U2504 GMC code indicates that the vehicle's onboard computer has detected invalid data being received from the Trailer Brake Driver Control Module. This module is responsible for controlling the trailer brakes on the vehicle. When the control module detects that the data it is receiving is incorrect or inconsistent, it triggers this diagnostic trouble code (DTC). This issue can affect the vehicle's performance by potentially causing problems with the trailer brake system, leading to issues with braking while towing a trailer. If not addressed, this issue could result in unsafe driving conditions, especially when towing heavy loads.

OBDII Code U2504 GMC - Invalid Data Received From Trailer Brake Driver Control Module
U2504 GMC Code - Invalid Data Received From Trailer Brake Driver Control Module

Common Causes of U2504 GMC

  1. Faulty Trailer Brake Driver Control Module
  2. Wiring issues or shorts in the trailer brake system
  3. Corrosion or damage to the CAN network connections
  4. Software glitches in the control module
  5. Electrical interference from aftermarket accessories

Symptoms of U2504 GMC

  1. Trailer brake system not functioning properly
  2. ABS warning light illuminated on the dashboard
  3. Trailer brakes locking up unexpectedly
  4. Loss of trailer brake control while towing
  5. Vehicle stability control system engaging unexpectedly

How to Fix U2504 GMC

  1. Begin by inspecting the wiring and connections in the trailer brake system for any damage or corrosion. Repair or replace any damaged wiring.
  2. Check the Trailer Brake Driver Control Module for any signs of malfunction. If necessary, replace the control module with a new one.
  3. Clear the DTC from the vehicle's computer system using a diagnostic scanner.
  4. Test the trailer brake system to ensure that the issue has been resolved and that the module is now receiving valid data.
  5. If the problem persists, further diagnostic testing may be required to pinpoint the exact cause of the communication error.

Cost to Fix U2504 GMC

The typical repair costs for addressing the U2504 GMC code can vary depending on the specific cause of the issue. In general, replacing a faulty Trailer Brake Driver Control Module can cost between $200 and $500, including parts and labor. However, additional costs may be incurred if wiring repairs or diagnostic testing are needed. It's important to note that labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate.

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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 U2504 GMC Code

1. What are the common symptoms of OBDII code U2504 GMC?

The common symptoms of OBDII code U2504 GMC include issues with the trailer brake system, warning lights on the dashboard, and potential loss of trailer brake functionality.

2. What causes the OBDII code U2504 GMC to occur?

The OBDII code U2504 GMC, "Invalid Data Received From Trailer Brake Driver Control Module," is typically triggered by communication errors between the vehicle's onboard computer system and the trailer brake control module.

3. How serious is the OBDII code U2504 GMC?

The severity of the OBDII code U2504 GMC depends on the extent of the communication failure between the vehicle and the trailer brake control module. It is important to address this code promptly to ensure the proper functioning of the trailer brake system.

4. How can I diagnose the OBDII code U2504 GMC?

Diagnosing the OBDII code U2504 GMC involves using a diagnostic scanner to retrieve the code and inspecting the trailer brake system components for any visible damage or loose connections.

5. What are some repair tips for fixing the OBDII code U2504 GMC?

Repair tips for resolving the OBDII code U2504 GMC include checking and repairing any wiring issues, ensuring proper connections between the vehicle and the trailer brake control module, and resetting the code after addressing the underlying problem.

6. Can I drive my vehicle with the OBDII code U2504 GMC active?

It is not recommended to drive your vehicle with the OBDII code U2504 GMC active, as it may indicate potential issues with the trailer brake system that could compromise safety while towing.

7. How much does it cost to repair the OBDII code U2504 GMC?

The cost to repair the OBDII code U2504 GMC can vary depending on the underlying cause of the communication error between the vehicle and the trailer brake control module. It is advisable to consult a professional mechanic for an accurate diagnosis and cost estimate.

8. Can a DIY enthusiast fix the OBDII code U2504 GMC?

While some DIY enthusiasts may be able to address the OBDII code U2504 GMC by checking wiring connections and performing basic troubleshooting, it is recommended to seek assistance from a qualified mechanic for a thorough diagnosis and repair.

9. Is the OBDII code U2504 GMC a common issue in GMC vehicles?

The OBDII code U2504 GMC, "Invalid Data Received From Trailer Brake Driver Control Module," is not uncommon in vehicles equipped with trailer brake systems, especially in GMC trucks and SUVs designed for towing.

10. How can I prevent the OBDII code U2504 GMC from occurring in the future?

To prevent the OBDII code U2504 GMC from occurring in the future, it is essential to regularly inspect and maintain the trailer brake system, ensure proper connections between the vehicle and the trailer brake control module, and address any warning lights or communication errors promptly.

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