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Engine-Codes – GMC – B3596 2016 GMC Sierra

B3596 2016 GMC Sierra Code - Hazard Lamps Request Circuit Malfunction

Quick Answer

The B3596 diagnostic trouble code (DTC) on a 2016 GMC Sierra indicates a malfunction in the Hazard Lamps Request Circuit. Common causes include Faulty hazard light switch, Wiring issues, such as loose connections or damaged wires, Malfunctioning Body Control Module (BCM). 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
B3596 2016 GMC Sierra indicates Hazard Lamps Request Circuit Malfunction.
Common causes
Common causes include Faulty hazard light switch, Wiring issues, such as loose connections or damaged wires, Malfunctioning Body Control Module (BCM).
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 11, 2024
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Code B3596 2016 GMC Sierra Description

The B3596 diagnostic trouble code (DTC) on a 2016 GMC Sierra indicates a malfunction in the Hazard Lamps Request Circuit. This code is set when the Body Control Module (BCM) detects a problem with the circuit responsible for activating the hazard lights. The hazard lights are an essential safety feature that alerts other drivers to potential hazards or emergencies, so it is crucial to address this issue promptly.

OBDII Code B3596 2016 GMC Sierra - Hazard Lamps Request Circuit Malfunction
B3596 2016 GMC Sierra Code - Hazard Lamps Request Circuit Malfunction

Common Causes of B3596 2016 GMC Sierra

  1. Faulty hazard light switch.
  2. Wiring issues, such as loose connections or damaged wires.
  3. Malfunctioning Body Control Module (BCM).
  4. Corrosion or water damage in the hazard light circuit.
  5. Electrical short circuits in the circuit.

Symptoms of B3596 2016 GMC Sierra

  1. Hazard lights not working or flashing intermittently.
  2. Hazard light switch not responding when activated.
  3. Dashboard indicator for hazard lights illuminated.
  4. Hazard lights staying on continuously without activation.
  5. Other exterior lights affected by the issue, such as turn signals or brake lights.

How to Fix B3596 2016 GMC Sierra

  1. Begin by conducting a visual inspection of the hazard light circuit, checking for any visible damage or loose connections.
  2. Test the hazard light switch for proper functionality using a multimeter to ensure it is sending signals to the BCM.
  3. Inspect the wiring harness for any signs of wear, corrosion, or damage. Repair or replace any faulty wiring as needed.
  4. Use a diagnostic scan tool to communicate with the BCM and retrieve any stored fault codes for further troubleshooting.
  5. If the issue persists, consider replacing the Body Control Module (BCM) after verifying all other components are functioning correctly.

Cost to Fix B3596 2016 GMC Sierra

The cost of repairing a Hazard Lamps Request Circuit malfunction can vary depending on the root cause of the issue. On average, the repair costs for this type of problem can range from $100 to $300, including parts and labor. However, this estimate is a general guideline, and actual costs may differ based on the specific diagnosis time and labor rates at auto repair shops. It is recommended to consult with a qualified mechanic or dealership for a more accurate cost estimate tailored to your vehicle and location.

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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 B3596 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code B3596 in a 2016 GMC Sierra?

- The common symptoms of OBDII code B3596, Hazard Lamps Request Circuit Malfunction, in a 2016 GMC Sierra may include non-functioning hazard lights or erratic behavior of the hazard lamp switch.

2. What are the possible causes of OBDII code B3596 in a 2016 GMC Sierra?

- Possible causes of OBDII code B3596 in a 2016 GMC Sierra include a faulty hazard lamp switch, wiring issues in the hazard lamp circuit, or a malfunctioning body control module.

3. How can I diagnose OBDII code B3596 in my 2016 GMC Sierra?

- To diagnose OBDII code B3596 in a 2016 GMC Sierra, you can use a diagnostic scanner to retrieve the code, visually inspect the hazard lamp switch and wiring, and perform circuit testing to pinpoint the issue.

4. Can I still drive my 2016 GMC Sierra with OBDII code B3596 present?

- It is generally safe to drive your 2016 GMC Sierra with OBDII code B3596 present, but it is recommended to address the issue promptly to ensure the proper functioning of your hazard lamps.

5. How can I repair OBDII code B3596 in my 2016 GMC Sierra?

- Repairing OBDII code B3596 in a 2016 GMC Sierra may involve replacing the hazard lamp switch, repairing or replacing damaged wiring, or reprogramming the body control module as necessary.

6. Is it possible to reset OBDII code B3596 in a 2016 GMC Sierra without repairs?

- While clearing the code temporarily may be possible by resetting the vehicle's computer, it is recommended to address the underlying issue causing OBDII code B3596 to prevent the problem from recurring.

7. Are there any safety concerns associated with OBDII code B3596 in a 2016 GMC Sierra?

- OBDII code B3596 related to the hazard lamps may compromise the visibility of your vehicle to other drivers, especially in emergency situations, so it is important to address the issue promptly for safety reasons.

8. Can a DIY enthusiast without extensive automotive experience fix OBDII code B3596 in a 2016 GMC Sierra?

- While some aspects of diagnosing and repairing OBDII code B3596 may be within reach of a DIY enthusiast, it is recommended to consult a professional mechanic for accurate diagnosis and proper repair to avoid complications.

9. What is the typical cost to repair OBDII code B3596 in a 2016 GMC Sierra at a dealership?

- The cost to repair OBDII code B3596 at a dealership for a 2016 GMC Sierra can vary depending on the specific issue, but it may include diagnostic fees, parts costs, and labor charges, ranging from a few hundred to over a thousand dollars.

10. How long does it usually take to repair OBDII code B3596 in a 2016 GMC Sierra?

- The time required to repair OBDII code B3596 in a 2016 GMC Sierra can vary based on the complexity of the issue and the availability of parts, but it may take a few hours to a day for a professional mechanic to diagnose and fix the problem.

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