AutoCodes – GMC – B3596 2014 GMC Sierra

B3596 2014 GMC Sierra Code - Hazard Lamps Request Circuit Malfunction

Quick Answer

The hazard flashers may be activated in any power mode. Common causes include Faulty Turn Signal/Multifunction Switch, Turn Signal/Multifunction Switch harness is open or shorted, Turn Signal/Multifunction Switch 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: B3596 2014 GMC Sierra indicates Hazard Lamps Request Circuit Malfunction.
Common causes: Common causes include Faulty Turn Signal/Multifunction Switch, Turn Signal/Multifunction Switch harness is open or shorted, Turn Signal/Multifunction Switch 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.

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Code Popularity 201

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 13, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3596 2014 GMC Sierra Description

The hazard flashers may be activated in any power mode. The hazard warning switch signal circuit is momentarily grounded when the hazard warning switch is pressed. The Body Control Module (BCM) responds to the hazard warning switch signal input by supplying battery voltage to all four turn signal lamps in an ON and OFF duty cycle. When the hazard warning switch is activated, the BCM sends a serial data message to the instrument cluster requesting both turn signal indicators to be cycled ON and OFF. The Diagnostic Trouble Code (DTC) sets when the BCM detects a short to ground in the hazard warning switch signal circuit.

OBDII Code B3596 2014 GMC Sierra - Hazard Lamps Request Circuit Malfunction - AutoCodes.com — B3596 2014 GMC Sierra Code - Hazard Lamps Request Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC B3596 2014 GMC Sierra?

Faulty Turn Signal/Multifunction Switch
Turn Signal/Multifunction Switch harness is open or shorted
Turn Signal/Multifunction Switch circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B3596 2014 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 B3596 2014 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.

Need more information about the B3596 2014 GMC Sierra code?

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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 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code B3596 in a 2014 GMC Sierra?

The common symptoms include non-functioning hazard lamps or erratic behavior of the hazard light system.

2. What can cause the Hazard Lamps Request Circuit Malfunction in a 2014 GMC Sierra?

Potential causes of this issue can range from a faulty hazard lamp switch to a malfunctioning body control module.

3. How can I diagnose the Hazard Lamps Request Circuit Malfunction in my 2014 GMC Sierra?

You can diagnose this issue by checking the wiring connections, inspecting the hazard lamp switch, and using an OBDII scanner to read the trouble code.

4. Can I still drive my 2014 GMC Sierra with OBDII code B3596?

While the vehicle may still be operational, it is recommended to address the issue promptly to ensure the hazard lamps function correctly for safety reasons.

5. What are the repair options for fixing the Hazard Lamps Request Circuit Malfunction in a 2014 GMC Sierra?

Repair options include replacing the hazard lamp switch, repairing any damaged wiring, or reprogramming the body control module if necessary.

6. Are there any DIY tips for troubleshooting OBDII code B3596 in a 2014 GMC Sierra?

You can start by checking the fuse related to the hazard lamps, inspecting the hazard lamp switch for any visible damage, and ensuring all connections are secure.

7. How critical is it to address the Hazard Lamps Request Circuit Malfunction in a 2014 GMC Sierra?

While it may not affect the drivability of the vehicle, addressing this issue is important for the proper functioning of the hazard light system, which is crucial for safety on the road.

8. Can extreme weather conditions impact the occurrence of OBDII code B3596 in a 2014 GMC Sierra?

Extreme weather conditions, such as moisture or temperature fluctuations, can potentially exacerbate issues with the hazard lamp circuit, leading to the malfunction.

9. Is resetting the OBDII code B3596 in a 2014 GMC Sierra a temporary solution?

Resetting the code without addressing the root cause may temporarily clear the error code, but it is not a permanent solution and the issue may recur.

10. How much does it typically cost to repair the Hazard Lamps Request Circuit Malfunction in a 2014 GMC Sierra?

The cost of repair can vary depending on the specific cause of the issue, but it may range from a few hundred dollars for parts and labor to over a thousand for more extensive repairs involving the body control module.