B3920 2017 GMC Sierra Code - Seat Motors Group 1 Common Circuit
Quick Answer
The B3920 diagnostic trouble code (DTC) for the 2017 GMC Sierra relates to the Seat Motors Group 1 Common Circuit. Common causes include Wiring harness damage or corrosion, Faulty seat motor control module, Blown fuse related to the seat motors. 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 2017 GMC Sierra indicates Seat Motors Group 1 Common Circuit.
- Common causes
- Common causes include Wiring harness damage or corrosion, Faulty seat motor control module, Blown fuse related to the seat motors.
- 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 2017 GMC Sierra Description
The B3920 diagnostic trouble code (DTC) for the 2017 GMC Sierra relates to the Seat Motors Group 1 Common Circuit. This code indicates a problem with the common circuit that controls the seat motors in the vehicle. The common circuit is responsible for providing power and communication signals to the various seat motors, allowing for adjustments such as seat movement, reclining, and lumbar support.
Common Causes of B3920 2017 GMC Sierra
- Wiring harness damage or corrosion
- Faulty seat motor control module
- Blown fuse related to the seat motors
- Failed seat motor components
- Poor electrical connections within the seat motor system
Symptoms of B3920 2017 GMC Sierra
- Inability to adjust seat position
- Seat motors not responding to control inputs
- Seat stuck in one position
- Unusual noises coming from the seat motors
- Warning light on the dashboard indicating a seat motor issue
How to Fix B3920 2017 GMC Sierra
- Begin by conducting a thorough inspection of the seat motor system, checking for any visible damage or loose connections.
- Use a multimeter to test the continuity of the wiring harness and identify any faulty wires that may be causing the issue.
- Check the seat motor control module for signs of damage or malfunction, and replace if necessary.
- Test the seat motors themselves to ensure they are functioning properly, replacing any faulty motors as needed.
- Clear the DTC from the vehicle's computer system using a diagnostic scanner once the repair has been completed.
Cost to Fix B3920 2017 GMC Sierra
The typical repair costs for addressing the B3920 code in a 2017 GMC Sierra can vary depending on the specific cause of the issue and the extent of the repairs needed. On average, the cost for parts and labor for this repair could range from $200 to $500. However, it is important to note that diagnostic time and labor rates can vary significantly depending on the location, dealership or independent repair shop, and the expertise of the technician. It is recommended to obtain a quote from a trusted auto repair shop to get a more accurate estimate for this repair.
Tech Notes for B3920 2017 GMC Sierra
B3920 02 Group 1 Seat Motors Circuit Shorted to Ground
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Frequently Asked Questions about B3920 2017 GMC Sierra Code
1. What does the OBDII code B3920 mean on a 2017 GMC Sierra?
B3920 indicates a problem with the Seat Motors Group 1 Common Circuit, which relates to the wiring or control of the seat adjustment motors.
2. What are the common symptoms of code B3920 in a 2017 GMC Sierra?
Symptoms include the seat adjustment motor not functioning, slow or uneven seat movement, or intermittent operation.
3. What causes the B3920 code to appear in a 2017 GMC Sierra?
Common causes include damaged wiring, a faulty seat motor, a malfunctioning seat control switch, or a poor ground connection in the circuit.
4. How is code B3920 diagnosed?
A technician will inspect the wiring, test the seat motor and control switch, and check for continuity or shorts in the circuit.
5. Can I still drive my 2017 GMC Sierra with a B3920 code?
Yes, the vehicle is safe to drive, but the seat adjustment functionality may be limited or inoperative.
6. How do I fix the B3920 code on a 2017 GMC Sierra?
Repairs may involve replacing damaged wiring, repairing a poor ground connection, or replacing a faulty seat motor or control switch.
7. How much does it cost to fix the B3920 code on a 2017 GMC Sierra?
Costs vary depending on the exact repair. Wiring repairs can cost $100-$300, while seat motor replacement may cost $400-$700.
8. Can I reset the B3920 code without repairing the issue?
You can clear the code with an OBDII scanner, but if the underlying issue isn’t resolved, the code will likely return.
9. What tools do I need to troubleshoot the B3920 code?
You’ll need an OBDII scanner, a multimeter for testing voltage and continuity, and possibly wiring diagrams for the seat motor circuit.
10. Does the B3920 code affect other vehicle systems?
No, this code is specific to the seat motor circuit and doesn’t affect other vehicle systems.
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