C1595 2016 GMC Sierra Code - Trailer Brake Signal to Trailer Brake Power Control Module Circuit Malfunction
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
- C1595 2016 GMC Sierra indicates Trailer Brake Signal to Trailer Brake Power Control Module Circuit Malfunction.
- 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 C1595 2016 GMC Sierra Description
What are the Possible Causes of the DTC C1595 2016 GMC Sierra?
- 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 C1595 2016 GMC Sierra?
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 C1595 2016 GMC Sierra 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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Frequently Asked Questions about C1595 2016 GMC Sierra Code
1. What does the OBDII code C1595 mean on a 2016 GMC Sierra?
The code C1595 indicates a "Trailer Brake Signal to Trailer Brake Power Control Module Circuit Malfunction," meaning there’s an issue with the signal or wiring in the trailer brake system.
2. What are the common symptoms of code C1595 on a GMC Sierra?
Symptoms include the trailer brakes not functioning properly, a "Service Trailer Brake System" warning on the dashboard, or the trailer brake controller not responding.
3. What causes the C1595 code to trigger on a 2016 GMC Sierra?
Common causes include damaged or corroded wiring, a faulty trailer brake power control module, a defective trailer brake switch, or poor connections at the trailer brake controller.
4. Can the C1595 code affect normal driving without a trailer?
No, the code typically does not affect normal driving without a trailer, but it will prevent the trailer brake system from working when towing.
5. How do I diagnose a C1595 code on my GMC Sierra?
Start by checking the trailer brake wiring and connectors for damage or corrosion. Use a multimeter to test for proper voltage and continuity. Inspect the trailer brake power control module and switch for faults.
6. Can a faulty trailer cause the C1595 code on my truck?
Yes, a trailer with damaged wiring or malfunctioning brakes can cause the code to appear, as the truck's system may sense an issue with the signal.
7. How do I fix the C1595 code on a 2016 GMC Sierra?
Repairs may include fixing or replacing damaged wiring, cleaning corroded connectors, or replacing the trailer brake power control module or switch if they are faulty.
8. What tools are needed to troubleshoot the C1595 code?
You’ll need a multimeter to test wiring and voltage, an OBDII scanner to confirm and clear the code, and possibly wiring diagrams for the trailer brake system.
9. Is it safe to tow with the C1595 code active?
No, it’s not safe to tow because the trailer brake system may not function, increasing the risk of accidents, especially when stopping or braking downhill.
10. Do I need to reprogram the trailer brake control module after fixing the C1595 code?
In most cases, reprogramming is not necessary, but you may need to clear the code with an OBDII scanner after repairs are completed.
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