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Engine-Codes – GMC – C1595 GMC

C1595 GMC Code - Trailer Brake Signal to Trailer Brake Power Control Module Circuit Malfunction

Quick Answer

The C1595 GMC code indicates a malfunction in the Trailer Brake Signal to Trailer Brake Power Control Module circuit. Common causes include Damaged or corroded wiring in the trailer brake signal circuit, Faulty connectors or poor electrical connections between the vehicle and the trailer brake power control module, Malfunctioning trailer brake power control module. 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
C1595 GMC indicates Trailer Brake Signal to Trailer Brake Power Control Module Circuit Malfunction.
Common causes
Common causes include Damaged or corroded wiring in the trailer brake signal circuit, Faulty connectors or poor electrical connections between the vehicle and the trailer brake power control module, Malfunctioning trailer brake power control module.
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 15, 2024
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Code C1595 GMC Description

The C1595 GMC code indicates a malfunction in the Trailer Brake Signal to Trailer Brake Power Control Module circuit. This system is responsible for transmitting signals from the vehicle to the trailer brake power control module, which controls the trailer brakes. When this circuit malfunctions, it can lead to issues with the trailer brake system, affecting the vehicle's ability to safely stop when towing a trailer.

OBDII Code C1595 GMC - Trailer Brake Signal to Trailer Brake Power Control Module Circuit Malfunction
C1595 GMC Code - Trailer Brake Signal to Trailer Brake Power Control Module Circuit Malfunction

Common Causes of C1595 GMC

  1. Damaged or corroded wiring in the trailer brake signal circuit.
  2. Faulty connectors or poor electrical connections between the vehicle and the trailer brake power control module.
  3. Malfunctioning trailer brake power control module.
  4. Issues with the vehicle's brake system affecting the signal transmission to the trailer brakes.
  5. Water or moisture intrusion causing electrical problems in the circuit.

Symptoms of C1595 GMC

  1. Trailer brakes not engaging properly when the vehicle brakes are applied.
  2. Warning lights on the dashboard related to the trailer brake system.
  3. Inconsistent braking performance when towing a trailer.
  4. Trailer brake system failure messages displayed on the vehicle's information center.
  5. Increased stopping distances when towing a trailer.

How to Fix C1595 GMC

  1. Begin by inspecting the wiring and connectors in the trailer brake signal circuit for any damage or corrosion. Repair or replace any faulty components.
  2. Check the trailer brake power control module for proper functioning and replace it if necessary.
  3. Test the signal transmission between the vehicle and the trailer brake system to ensure proper communication.
  4. Clear the diagnostic trouble codes from the vehicle's system and test the trailer brake system under load conditions to verify proper operation.
  5. Perform a final road test to confirm that the trailer brakes are functioning correctly and that the code has been successfully resolved.

Cost to Fix C1595 GMC

The typical repair costs for addressing a C1595 GMC code can range from $200 to $500, depending on the extent of the issue and the specific components that need to be replaced. This estimate includes parts and labor, but actual costs may vary based on the vehicle's make and model, as well as the location and labor rates of the auto repair shop. It's recommended to consult with a professional mechanic for a more accurate cost estimate tailored to your specific situation.

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Information for Specific GMC Models

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 C1595 GMC Code

1. What are common symptoms of OBDII code C1595 GMC?

Common symptoms include the trailer brake system not working properly, warning lights on the dashboard, and potential issues with the trailer brake module.

2. What can cause the OBDII code C1595 GMC to appear?

Possible causes include damaged wiring in the trailer brake system, a faulty trailer brake power control module, or issues with the trailer brake signal circuit.

3. How can I diagnose the OBDII code C1595 GMC?

Diagnosis involves inspecting the trailer brake system wiring, checking the trailer brake power control module for faults, and testing the trailer brake signal circuit for continuity.

4. Can I still drive my vehicle with the OBDII code C1595 GMC present?

It is not recommended to drive the vehicle with this code present, as it may affect the functionality of the trailer brake system and compromise safety.

5. How can I repair OBDII code C1595 GMC?

Repairs may involve repairing or replacing damaged wiring, replacing the trailer brake power control module, or addressing any issues with the trailer brake signal circuit.

6. Are there any DIY tips for addressing OBDII code C1595 GMC?

DIY tips include checking and securing all trailer brake system connections, inspecting the trailer brake system wiring for damage, and ensuring proper power supply to the trailer brake power control module.

7. Can weather conditions affect the appearance of OBDII code C1595 GMC?

Extreme weather conditions or exposure to moisture can potentially cause issues with the trailer brake system wiring, leading to the appearance of this fault code.

8. Will resetting the OBDII code C1595 GMC make it go away permanently?

Resetting the code may temporarily clear the warning light, but if the underlying issue is not addressed, the code is likely to reappear.

9. Is it necessary to visit a mechanic for OBDII code C1595 GMC diagnosis and repair?

While some DIY checks can be performed, it is recommended to consult a qualified mechanic for a thorough diagnosis and proper repair of this fault code.

10. How can I prevent OBDII code C1595 GMC from reoccurring in the future?

Regular maintenance checks on the trailer brake system, ensuring proper wiring connections, and addressing any issues promptly can help prevent the reappearance of this fault code.

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