B3596 2015 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 2015 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.
Code B3596 2015 GMC Sierra Description
What are the Possible Causes of the DTC B3596 2015 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 2015 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 2015 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 B3596 2015 GMC Sierra Code
1. What does the OBDII code B3596 mean on a 2015 GMC Sierra?
The B3596 code indicates a malfunction in the Hazard Lamps Request Circuit, which is responsible for activating the hazard lights.
2. What are common symptoms of the B3596 code in a 2015 GMC Sierra?
Symptoms may include non-functional hazard lights, hazard lights that stay on or flash erratically, or a warning light on the instrument cluster.
3. What causes the B3596 Hazard Lamps Request Circuit Malfunction?
Common causes include a faulty hazard switch, damaged wiring or connectors in the circuit, or a malfunctioning body control module (BCM).
4. How is the B3596 code diagnosed?
A technician will use a scan tool to verify the code, inspect the hazard switch, check for damaged wiring or connectors, and test the BCM for proper operation.
5. Can I still drive my GMC Sierra with the B3596 code?
Yes, the vehicle can still be driven, but you may not have functioning hazard lights, which is a safety concern in emergency situations.
6. How do I fix the B3596 code in my 2015 GMC Sierra?
Repairs may include replacing the hazard switch, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the BCM.
7. How much does it cost to fix the B3596 code?
Repair costs vary but may range from $100 to $500 depending on whether the issue is with the switch, wiring, or BCM.
8. Can a dead battery cause the B3596 code to appear?
While unlikely, a weak or dead battery can cause electronic malfunctions, so it’s worth checking the battery and charging system.
9. Do I need to reset the B3596 code after repairs?
Yes, after repairs, the code should be cleared using a scan tool to ensure the issue has been resolved.
10. Is the B3596 code specific to GMC vehicles?
While the code is common on GMC vehicles, it may also appear on other GM models with similar systems.
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