C1596 GMC Code - Trailer Brake Power Control Module Enable Circuit
Quick Answer
The Chassis Control Module-Auxiliary receives inputs from the Trailer Brake Power Control Module; these inputs are used to determine trailer connection and the amount of voltage supplied to the trailer brakes. Common causes include Faulty Trailer Brake Power Control Module, Trailer Brake Power Control Module harness is open or shorted, Trailer Brake Power 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
- C1596 GMC indicates Trailer Brake Power Control Module Enable Circuit.
- Common causes
- Common causes include Faulty Trailer Brake Power Control Module, Trailer Brake Power Control Module harness is open or shorted, Trailer Brake Power 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.
Code C1596 GMC Description
What are the Possible Causes of the DTC C1596 GMC?
- Faulty Trailer Brake Power Control Module
- Trailer Brake Power Control Module harness is open or shorted
- Trailer Brake Power Control Module circuit poor electrical connection
- Faulty Chassis Control Module-Auxiliary
How to Fix the DTC C1596 GMC?
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 C1596 GMC 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.
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Information for Specific GMC Models
- C1596 2014 GMC Sierra — Trailer Brake Power Control Module Enable Circuit
- C1596 2015 GMC Sierra — Trailer Brake Power Control Module Enable Circuit
- C1596 2016 GMC Sierra — Trailer Brake Power Control Module Enable Circuit
- C1596 2017 GMC Sierra — Trailer Brake Power Control Module Enable Circuit
- C1596 2018 GMC Sierra — Trailer Brake Power Control Module Enable Circuit
Frequently Asked Questions about C1596 GMC Code
What does the OBDII code C1596 mean for a GMC vehicle?
The code C1596 indicates an issue with the Trailer Brake Power Control Module Enable Circuit, which affects trailer brake functionality.
What are the common symptoms of code C1596 in a GMC vehicle?
Symptoms may include a trailer brake warning light, inability to engage trailer brakes, or reduced braking performance when towing.
What causes the C1596 code in GMC vehicles?
Common causes include faulty wiring or connectors in the trailer brake control module circuit, a malfunctioning control module, or issues with the fuse or power supply.
Can I still tow a trailer with the C1596 code active?
While towing may still be possible, the trailer brakes may not function properly, which could compromise safety.
How can I diagnose the C1596 code in a GMC vehicle?
Start by inspecting the wiring, connectors, and fuse for the trailer brake control module. Use a multimeter to test voltage and continuity in the enable circuit.
How do I fix the C1596 code in my GMC vehicle?
Repair or replace damaged wiring, connectors, or the fuse. If the issue persists, the Trailer Brake Power Control Module may need replacement.
Is the C1596 code common in GMC vehicles?
It’s not a frequent issue but can occur in vehicles equipped with a trailer brake system, especially in older or heavily used trucks.
Can a faulty Trailer Brake Power Control Module cause other issues?
Yes, it may result in loss of trailer brake functionality and potentially affect towing stability and safety.
Will clearing the C1596 code resolve the problem?
Clearing the code may temporarily remove the warning, but if the underlying issue isn't fixed, the code will return.
Do I need special tools to fix the C1596 code?
A diagnostic scanner is useful for identifying the code, and a multimeter may be needed to test the circuit components.
Discuss the causes and fixes for C1596 GMC OBDII Code
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