B3949 2014 GMC Sierra Code - Right Front Turn Signal Circuit
Quick Answer
Ground is applied at all times to the turn signal/multifunction switch. Common causes include Faulty Right Front Turn Signal Lamp, Right Front Turn Signal Lamp harness is open or shorted, Right Front 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
- B3949 2014 GMC Sierra indicates Right Front Turn Signal Circuit.
- Common causes
- Common causes include Faulty Right Front Turn Signal Lamp, Right Front Turn Signal Lamp harness is open or shorted, Right Front 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 B3949 2014 GMC Sierra Description
What are the Possible Causes of the DTC B3949 2014 GMC Sierra?
- Faulty Right Front Turn Signal Lamp
- Right Front Turn Signal Lamp harness is open or shorted
- Right Front Turn Signal Lamp circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC B3949 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 B3949 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.
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Frequently Asked Questions about B3949 2014 GMC Sierra Code
1. What does the OBDII code B3949 mean on a 2014 GMC Sierra?
B3949 indicates an issue with the right front turn signal circuit, typically involving a malfunction in the wiring, bulb, or related components.
2. What are the common symptoms of code B3949 on a 2014 GMC Sierra?
Common symptoms include the right front turn signal not working, rapid flashing of the turn signal indicator, or a warning message on the dashboard.
3. What causes the B3949 code to appear on a 2014 GMC Sierra?
Causes may include a burnt-out bulb, faulty wiring or connections, a damaged turn signal socket, or a malfunctioning body control module (BCM).
4. How do I diagnose the B3949 code on my 2014 GMC Sierra?
Start by checking the right front turn signal bulb, inspecting the wiring and connectors for damage or corrosion, and using a multimeter to test for proper voltage at the socket.
5. Can a burnt-out bulb trigger the B3949 code on a 2014 GMC Sierra?
Yes, a burnt-out or faulty turn signal bulb is a common cause of this code.
6. How do I fix the B3949 code on my 2014 GMC Sierra?
Replace the right front turn signal bulb if necessary, repair any damaged wires or connectors, and clear the code to see if it returns.
7. Could a faulty body control module (BCM) cause code B3949?
Yes, though less common, a malfunctioning BCM can cause issues with the turn signal circuit and trigger the B3949 code.
8. How can I prevent the B3949 code from reoccurring on my 2014 GMC Sierra?
Regularly inspect and maintain the turn signal bulbs, sockets, and wiring to ensure they are in good condition.
9. Is it safe to drive with the B3949 code on my 2014 GMC Sierra?
Driving with a malfunctioning turn signal can be unsafe as it affects your ability to communicate with other drivers. It’s best to address the issue promptly.
10. Will clearing the B3949 code without repairs fix the problem on my 2014 GMC Sierra?
No, clearing the code without addressing the underlying issue will likely result in the code returning. Proper diagnosis and repair are necessary.
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