B3951 2015 GMC Sierra Code - Right Rear Turn Signal Circuit
Quick Answer
Ground is applied at all times to the turn signal/multifunction switch. Common causes include Faulty Right Rear Turn Signal Lamp, Right Rear Turn Signal Lamp harness is open or shorted, Right Rear Turn Signal Lamp 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
- B3951 2015 GMC Sierra indicates Right Rear Turn Signal Circuit.
- Common causes
- Common causes include Faulty Right Rear Turn Signal Lamp, Right Rear Turn Signal Lamp harness is open or shorted, Right Rear Turn Signal Lamp 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 B3951 2015 GMC Sierra Description
What are the Possible Causes of the DTC B3951 2015 GMC Sierra?
- Faulty Right Rear Turn Signal Lamp
- Right Rear Turn Signal Lamp harness is open or shorted
- Right Rear Turn Signal Lamp circuit poor electrical connection
How to Fix the DTC B3951 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.
Code Tech Notes
B3951:02 Right Rear Turn Signal Circuit Short to Ground
B3951:04 Right Rear Turn Signal Circuit Open
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B3951 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 B3951 2015 GMC Sierra Code
What does the OBDII code B3951 mean for a 2015 GMC Sierra?
The code B3951 indicates a fault in the right rear turn signal circuit, often due to wiring, a bulb issue, or a failed module.
What are the symptoms of code B3951 on a GMC Sierra?
Symptoms may include the right rear turn signal not working, rapid flashing of the turn signal indicator, or a warning message on the dashboard.
What causes the B3951 code to appear on a 2015 GMC Sierra?
Common causes include a burned-out bulb, damaged wiring, corroded connectors, or a malfunctioning Body Control Module (BCM).
Can a faulty turn signal bulb trigger code B3951?
Yes, a failed or incorrect bulb can disrupt the circuit and trigger the B3951 code.
How do you diagnose code B3951 on a GMC Sierra?
Start by inspecting the right rear turn signal bulb, wiring, and connectors for damage or corrosion. Use a scan tool to check for related codes and test the circuit.
Can driving with code B3951 cause further damage?
While it may not cause immediate damage, driving with a faulty turn signal can pose safety risks and lead to potential traffic violations.
How do you fix code B3951 on a 2015 GMC Sierra?
Repair steps include replacing the turn signal bulb, repairing damaged wiring or connectors, and resetting the code with a scan tool.
Does the B3951 code require replacing the BCM?
Not always. Replace the Body Control Module only if other repairs fail and diagnostics confirm it is faulty.
Will clearing the B3951 code solve the issue permanently?
No, clearing the code without addressing the underlying problem will likely result in the code returning.
How much does it cost to fix code B3951 on a GMC Sierra?
Costs vary based on the issue. Replacing a bulb may cost $10-$30, while BCM repairs can exceed $300-$500, plus labor.
Discuss the causes and fixes for B3951 2015 GMC Sierra OBDII Code
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