B3948 2017 Chevrolet Silverado Code - Left Front Turn Signal Circuit
Quick Answer
Ground is applied at all times to the turn signal/multifunction switch. Common causes include Faulty Left Front Turn Signal Lamp, Left Front Turn Signal Lamp harness is open or shorted, Left 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
- B3948 2017 Chevrolet Silverado indicates Left Front Turn Signal Circuit.
- Common causes
- Common causes include Faulty Left Front Turn Signal Lamp, Left Front Turn Signal Lamp harness is open or shorted, Left 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 B3948 2017 Chevrolet Silverado Description
What are the Possible Causes of the DTC B3948 2017 Chevrolet Silverado?
- Faulty Left Front Turn Signal Lamp
- Left Front Turn Signal Lamp harness is open or shorted
- Left Front Turn Signal Lamp circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC B3948 2017 Chevrolet Silverado?
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 B3948 2017 Chevrolet Silverado 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 B3948 2017 Chevrolet Silverado Code
1. What does the OBDII code B3948 mean on a 2017 Chevrolet Silverado?
The code B3948 indicates an issue with the left front turn signal circuit, such as an open or short, preventing proper operation.
2. What are the symptoms of code B3948 in a 2017 Chevrolet Silverado?
Symptoms include the left front turn signal not working, rapid blinking of the turn signal indicator, or the presence of a warning message on the dashboard.
3. What causes the B3948 code to appear on a 2017 Chevrolet Silverado?
Common causes include a blown bulb, damaged wiring, corroded connectors, or a faulty turn signal relay/module.
4. How do I diagnose the B3948 code in my 2017 Chevrolet Silverado?
Start by inspecting the left front turn signal bulb, socket, and wiring for damage or corrosion. Use a multimeter to check for proper voltage and ground.
5. Can a blown bulb trigger the B3948 code?
Yes, a blown or burned-out bulb in the left front turn signal can cause the B3948 code to set.
6. How do I fix the B3948 code on my 2017 Chevrolet Silverado?
Replace the left front turn signal bulb if it's blown, repair any damaged wiring or connectors, and clear the code using an OBDII scanner.
7. Is it safe to drive with the B3948 code active?
While the vehicle may still be drivable, the left front turn signal won't function properly, which can be a safety hazard and may lead to a traffic ticket.
8. Can a faulty Body Control Module (BCM) cause the B3948 code?
Yes, though less common, a malfunctioning BCM can cause this code if it fails to send the proper signal to the turn signal circuit.
9. How much does it cost to repair the B3948 code on a 2017 Chevrolet Silverado?
Repair costs vary but typically range from $20 for a bulb replacement to $200 or more if wiring or module repairs are needed.
10. Can I clear the B3948 code without fixing the issue?
You can clear the code with an OBDII scanner, but it will likely return if the underlying issue isn't resolved.
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