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Engine-Codes – GMC – B3596 2017 GMC Sierra

B3596 2017 GMC Sierra Code - Hazard Lamps Request Circuit Malfunction

Quick Answer

The B3596 diagnostic trouble code (DTC) for a 2017 GMC Sierra refers to a Hazard Lamps Request Circuit Malfunction. Common causes include Faulty hazard lamp switch, Defective hazard lamp relay, Wiring issues or shorts in the hazard lamp circuit. 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 2017 GMC Sierra indicates Hazard Lamps Request Circuit Malfunction.
Common causes
Common causes include Faulty hazard lamp switch, Defective hazard lamp relay, Wiring issues or shorts in the hazard lamp circuit.
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 2017 GMC Sierra Description

The B3596 diagnostic trouble code (DTC) for a 2017 GMC Sierra refers to a Hazard Lamps Request Circuit Malfunction. This code indicates that there is a problem with the circuit that controls the hazard lamps in the vehicle. The hazard lamps, also known as the emergency flashers, are a crucial safety feature that alerts other drivers of a potential hazard or emergency situation. When this circuit malfunctions, it can lead to the hazard lamps not working properly, which can compromise the safety of the vehicle and its occupants.

OBDII Code B3596 2017 GMC Sierra - Hazard Lamps Request Circuit Malfunction
B3596 2017 GMC Sierra Code - Hazard Lamps Request Circuit Malfunction

Common Causes of B3596 2017 GMC Sierra

  1. Faulty hazard lamp switch
  2. Defective hazard lamp relay
  3. Wiring issues or shorts in the hazard lamp circuit
  4. BCM malfunction or failure
  5. Corrosion or damage to the connectors in the hazard lamp circuit

Symptoms of B3596 2017 GMC Sierra

  1. Hazard lamps not turning on when activated
  2. Hazard lamps flashing intermittently or erratically
  3. Check engine light illuminated on the dashboard
  4. Loss of control over hazard lamp function from the switch

How to Fix B3596 2017 GMC Sierra

  1. Begin by conducting a thorough visual inspection of the hazard lamp circuit, checking for any visible damage, loose connections, or corrosion.
  2. Test the hazard lamp switch and relay for proper functionality using a multimeter to ensure they are sending the correct signals to the BCM.
  3. Inspect the wiring harness for any signs of damage or shorts that could be affecting the circuit.
  4. If the issue persists, the BCM may need to be reprogrammed or replaced to rectify the Hazard Lamps Request Circuit Malfunction.
  5. Once the necessary repairs have been made, clear the DTC and test the hazard lamps to ensure they are functioning correctly.

Cost to Fix B3596 2017 GMC Sierra

The cost of repairing a Hazard Lamps Request Circuit Malfunction can vary depending on the underlying cause of the issue and the extent of the repairs needed. On average, the parts required for this repair, such as a new hazard lamp switch or BCM, can range from $50 to $200. Labor costs at an auto repair shop typically range from $80 to $150 per hour, and the total repair time can vary depending on the complexity of the issue. Therefore, the total cost of this repair could range from $150 to $500 or more, including parts and labor. It's advisable to consult with a professional mechanic to get a more accurate estimate based on the specific circumstances of your vehicle.

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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 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code B3596 in a 2017 GMC Sierra?

The common symptoms include non-functional hazard lamps, flashing hazard lights without activation, or a warning light on the dashboard indicating a malfunction.

2. What could cause the Hazard Lamps Request Circuit Malfunction in a 2017 GMC Sierra?

Possible causes of this code include a faulty hazard lamp switch, damaged wiring or connectors in the circuit, or a malfunctioning Body Control Module (BCM).

3. How can I diagnose the Hazard Lamps Request Circuit Malfunction in my GMC Sierra?

To diagnose this issue, you can use an OBDII scanner to retrieve the specific fault code, visually inspect the hazard lamp switch and associated wiring, and perform continuity tests to check for any open or short circuits.

4. Can I still drive my GMC Sierra with the Hazard Lamps Request Circuit Malfunction code?

While it may be safe to drive the vehicle with this code, it is recommended to address the issue promptly to ensure proper functionality of the hazard lamps, which are crucial for emergency situations.

5. Is it possible to reset the B3596 OBDII code in a 2017 GMC Sierra without fixing the underlying issue?

Resetting the code without addressing the root cause will only temporarily clear the warning light, as the issue will likely reoccur once the system detects the fault again.

6. What are some repair tips for fixing the Hazard Lamps Request Circuit Malfunction in a 2017 GMC Sierra?

Repair tips include checking and repairing any damaged wiring, replacing the hazard lamp switch if faulty, and, if necessary, having the BCM reprogrammed or replaced by a qualified technician.

7. Can extreme weather conditions affect the Hazard Lamps Request Circuit in a GMC Sierra?

Extreme weather conditions can potentially cause electrical issues in the circuit, such as corrosion or short circuits, leading to the malfunction. It is advisable to keep the vehicle protected and maintained to prevent weather-related damage.

8. Will fixing the Hazard Lamps Request Circuit Malfunction require specialized tools or equipment?

While basic tools like a multimeter and wiring diagram may be sufficient for diagnosis and some repairs, certain tasks like BCM reprogramming or replacement may require specialized equipment available at a dealership or auto repair shop.

9. How much can I expect to pay for repairing the Hazard Lamps Request Circuit Malfunction in a 2017 GMC Sierra?

The cost of repair can vary depending on the specific cause of the issue, the parts needed for replacement, and labor charges. It is recommended to obtain quotes from multiple mechanics or dealerships for an accurate estimate.

10. Can regular maintenance help prevent the Hazard Lamps Request Circuit Malfunction in my GMC Sierra?

Regular maintenance, such as checking and cleaning electrical connections, inspecting wiring for damage, and promptly addressing any warning lights on the dashboard, can help prevent issues like the Hazard Lamps Request Circuit Malfunction from occurring.

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