Engine-CodesGMC – C1596 2015 GMC Sierra

C1596 2015 GMC Sierra Code - Trailer Brake Power Control Module Enable Circuit

Quick Answer

The C1596 code for a 2015 GMC Sierra indicates a problem with the Trailer Brake Power Control Module Enable Circuit. Common causes include Faulty trailer brake power control module, Wiring issues or shorts in the enable circuit, Corrosion or damage to electrical connectors related to the 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
C1596 2015 GMC Sierra indicates Trailer Brake Power Control Module Enable Circuit.
Common causes
Common causes include Faulty trailer brake power control module, Wiring issues or shorts in the enable circuit, Corrosion or damage to electrical connectors related to the 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.
Table of contents Created and updated by William Orellana on Aug 19, 2024
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Code C1596 2015 GMC Sierra Description

The C1596 code for a 2015 GMC Sierra indicates a problem with the Trailer Brake Power Control Module Enable Circuit. This module is responsible for controlling the power distribution to the trailer brakes, ensuring smooth and effective braking while towing. When this circuit is not functioning properly, it can lead to issues with the trailer brake system, potentially compromising the safety and performance of the vehicle while towing heavy loads.

OBDII Code C1596 2015 GMC Sierra - Trailer Brake Power Control Module Enable Circuit
C1596 2015 GMC Sierra Code - Trailer Brake Power Control Module Enable Circuit

Common Causes of C1596 2015 GMC Sierra

  1. Faulty trailer brake power control module.
  2. Wiring issues or shorts in the enable circuit.
  3. Corrosion or damage to electrical connectors related to the module.
  4. Issues with the vehicle's battery or power supply affecting the module's operation.

Symptoms of C1596 2015 GMC Sierra

  1. Trailer brakes not engaging properly or inconsistently.
  2. Illumination of the trailer brake warning light on the dashboard.
  3. Loss of trailer brake functionality altogether.
  4. Erratic trailer brake behavior, such as sudden jerking or locking up.

How to Fix C1596 2015 GMC Sierra

  1. Begin by conducting a thorough inspection of the trailer brake power control module and associated wiring to identify any visible damage or corrosion.
  2. Test the module and enable circuit using a multimeter to check for proper voltage and continuity.
  3. Replace the trailer brake power control module if it is found to be faulty, ensuring proper installation and connection.
  4. Repair any damaged wiring or connectors, making sure to secure all connections properly.
  5. Perform a system test to ensure that the trailer brake functionality has been restored and that the code has been cleared from the vehicle's system.

Cost to Fix C1596 2015 GMC Sierra

The cost of repairing a Trailer Brake Power Control Module Enable Circuit issue can vary depending on the specific cause of the problem and the labor rates in your area. On average, you can expect to pay anywhere from $200 to $500 for parts and labor. Keep in mind that prices may differ based on the location, the complexity of the repair, and whether you choose to have the work done at a dealership, an independent shop, or by doing it yourself. It's recommended to get a detailed quote from a trusted mechanic before proceeding with the repair.

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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.

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