B3920 2018 GMC Sierra Code - Seat Motors Group 1 Common Circuit
Quick Answer
The B3920 code for the 2018 GMC Sierra refers to an issue with the Seat Motors Group 1 Common Circuit. Common causes include Wiring harness damage or short circuit, Faulty seat control module, Defective seat motor. 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
- B3920 2018 GMC Sierra indicates Seat Motors Group 1 Common Circuit.
- Common causes
- Common causes include Wiring harness damage or short circuit, Faulty seat control module, Defective seat motor.
- 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 B3920 2018 GMC Sierra Description
The B3920 code for the 2018 GMC Sierra refers to an issue with the Seat Motors Group 1 Common Circuit. This code indicates a problem within the circuit that controls the seat motors for various functions such as adjusting the seat position, reclining, and lumbar support. When this code is triggered, it means that there is a malfunction in the electrical system that controls these motors.
Common Causes of B3920 2018 GMC Sierra
- Wiring harness damage or short circuit
- Faulty seat control module
- Defective seat motor
- Loose or corroded electrical connections
- Water damage or moisture intrusion in the seat motors circuit
Symptoms of B3920 2018 GMC Sierra
- Inability to adjust the seat position
- Seat not reclining properly
- Loss of lumbar support functionality
- Seat motor not responding to controls
- Warning light on the dashboard related to seat motors
How to Fix B3920 2018 GMC Sierra
- Begin by conducting a thorough inspection of the seat motors circuit and wiring harness to identify any visible damage or loose connections.
- Use a multimeter to test the continuity of the circuit and check for any shorts or open circuits that may be causing the issue.
- Inspect the seat control module for any signs of malfunction and consider replacing it if necessary.
- Test the seat motors individually to determine if any of them are faulty and require replacement.
- Clear the diagnostic trouble codes from the vehicle's system and test the seat motors to ensure they are functioning properly.
Cost to Fix B3920 2018 GMC Sierra
The cost of repairing the Seat Motors Group 1 Common Circuit issue can vary depending on the specific cause of the problem and the parts and labor required for the repair. On average, the cost of parts for this repair could range from $100 to $500, while labor costs could range from $150 to $300. Overall, the total repair cost could be between $250 and $800. However, it's important to note that these are rough estimates, and actual costs may vary based on the location, vehicle make and model, and the specific diagnosis and repair process required. It's recommended to consult with a professional mechanic or auto repair shop for a more accurate cost estimate.
Tech Notes for B3920 2018 GMC Sierra
B3920 02 Group 1 Seat Motors Circuit Shorted to Ground
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Frequently Asked Questions about B3920 2018 GMC Sierra Code
1. What does the OBDII code B3920 mean on a 2018 GMC Sierra?
B3920 indicates an issue with the Seat Motors Group 1 Common Circuit, which involves the electrical system controlling seat movement.
2. What are common symptoms of code B3920 in a 2018 GMC Sierra?
Symptoms may include non-functional seat adjustments, limited movement of the seat, or intermittent operation of seat motors.
3. What causes code B3920 in a GMC Sierra?
Common causes include damaged wiring, a malfunctioning seat motor, a faulty control module, or poor electrical connections in the seat circuit.
4. How can I diagnose code B3920 on my 2018 GMC Sierra?
Use an OBDII scanner to confirm the code, then inspect the wiring, connectors, and seat motor for visible damage or loose connections.
5. Can a blown fuse cause the B3920 code in a GMC Sierra?
Yes, a blown seat circuit fuse can disrupt power to the seat motors and trigger the B3920 code.
6. Is it safe to drive my 2018 GMC Sierra with the B3920 code active?
Yes, the code does not impact vehicle drivability but may affect seat adjustment functionality, which could be inconvenient.
7. How do I repair the B3920 code on a 2018 GMC Sierra?
Repairs may include fixing or replacing damaged wiring, connectors, or the seat motor itself, and ensuring all connections are secure.
8. Can a faulty seat control module trigger code B3920?
Yes, a malfunctioning seat control module can cause the code if it fails to properly communicate with or power the seat motors.
9. How much does it cost to fix the B3920 code on a GMC Sierra?
Repair costs can vary widely, ranging from $50 for simple wiring fixes to several hundred dollars if the seat motor or control module needs replacement.
10. Will clearing the B3920 code solve the problem permanently?
Clearing the code may temporarily remove it, but if the underlying issue is not addressed, the code is likely to return.
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