Engine-Codes.com
Engine-Codes – GMC – B3920 2016 GMC Sierra

B3920 2016 GMC Sierra Code - Seat Motors Group 1 Common Circuit

Quick Answer

The B3920 code for the 2016 GMC Sierra relates to an issue with the Seat Motors Group 1 Common Circuit. Common causes include Faulty seat motor, Damaged wiring or connectors in the Seat Motors Group 1 Common Circuit, Malfunctioning control module. 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 2016 GMC Sierra indicates Seat Motors Group 1 Common Circuit.
Common causes
Common causes include Faulty seat motor, Damaged wiring or connectors in the Seat Motors Group 1 Common Circuit, Malfunctioning control module.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 07, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code B3920 2016 GMC Sierra Description

The B3920 code for the 2016 GMC Sierra relates to an issue with the Seat Motors Group 1 Common Circuit. This code indicates a problem with the electrical circuit that controls the seat motors in the vehicle. The seat motors are responsible for adjusting the position of the seats, including moving them forward and backward, up and down, and tilting the seatback. When this circuit is malfunctioning, it can lead to issues with seat adjustment, affecting the driver's comfort and ability to properly control the vehicle.

OBDII Code B3920 2016 GMC Sierra - Seat Motors Group 1 Common Circuit
B3920 2016 GMC Sierra Code - Seat Motors Group 1 Common Circuit

Common Causes of B3920 2016 GMC Sierra

  1. Faulty seat motor.
  2. Damaged wiring or connectors in the Seat Motors Group 1 Common Circuit.
  3. Malfunctioning control module.
  4. Electrical issues such as a short circuit or open circuit.
  5. Wear and tear on the seat adjustment mechanism.

Symptoms of B3920 2016 GMC Sierra

  1. Inability to adjust the seat position.
  2. Seat motors making unusual noises when trying to adjust the seat.
  3. Seat moving in one direction only or erratically.
  4. Seat adjustment controls not responding to input.
  5. Seat becoming stuck in a certain position.

How to Fix B3920 2016 GMC Sierra

  1. Begin by conducting a thorough inspection of the seat motors, wiring, and connectors to identify any visible damage.
  2. Use a multimeter to test the electrical continuity in the Seat Motors Group 1 Common Circuit to pinpoint the faulty component.
  3. Replace any damaged seat motors, wiring, connectors, or control module as needed.
  4. Clear the diagnostic trouble codes from the vehicle's system to reset the seat adjustment function.
  5. Test the seat adjustment mechanism to ensure it is functioning properly after the repair.

Cost to Fix B3920 2016 GMC Sierra

The typical repair costs for addressing the B3920 code related to the Seat Motors Group 1 Common Circuit in a 2016 GMC Sierra can vary depending on the extent of the issue and the specific components that need to be replaced. On average, the repair costs for this type of electrical issue can range from $200 to $500, including parts and labor. However, it's important to note that the actual costs may be higher or lower based on factors such as the location of the repair shop, the availability of parts, and the labor rates charged by the technician. It's recommended to consult with a trusted auto repair shop for a more accurate estimate based on the specific circumstances of the vehicle.

What does this mean?

Tech Notes for B3920 2016 GMC Sierra

B3920 01 Group 1 Seat Motors Circuit Shorted to Battery or Open
B3920 02 Group 1 Seat Motors Circuit Shorted to Ground

Need more information about the B3920 2016 GMC Sierra code?

Need more information on how to fix the B3920 2016 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B3920 2016 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B3920 2016 GMC Sierra Code

1. What does the OBDII code B3920 mean on a 2016 GMC Sierra?

The B3920 code indicates an issue with the Seat Motors Group 1 Common Circuit, typically related to the power seat motor or its control circuit.

2. What are common symptoms of code B3920 in a 2016 GMC Sierra?

Symptoms may include the power seat not moving, moving erratically, or stopping unexpectedly during adjustment.

3. What causes the B3920 code to appear?

Common causes include a faulty seat motor, damaged wiring or connectors, a malfunctioning seat control module, or a blown fuse.

4. How can I diagnose the B3920 code on my GMC Sierra?

Start by checking the power seat fuse, inspecting the wiring and connectors for damage, and testing the seat motor and control module for proper operation.

5. Can I still drive my 2016 GMC Sierra with the B3920 code active?

Yes, the vehicle is drivable, but the power seat adjustment may not work, which can affect driver comfort and proper seating position.

6. How do I fix the B3920 code on my GMC Sierra?

Repairs may include replacing a faulty seat motor, repairing damaged wiring, cleaning or reconnecting loose connectors, or replacing the seat control module.

7. How much does it typically cost to fix code B3920?

Repair costs vary but can range from $100 to $500, depending on whether the issue is with wiring, the motor, or the seat control module.

8. Can a blown fuse cause the B3920 code?

Yes, a blown fuse in the power seat circuit can trigger this code and should be checked first.

9. Is it safe to clear the B3920 code without repairs?

Clearing the code without addressing the underlying issue may result in the problem recurring and continued seat adjustment issues.

10. Can I repair the B3920 issue myself on a 2016 GMC Sierra?

If you’re comfortable working with vehicle electronics, you can inspect and repair wiring or replace components, but complex issues may require professional assistance.

Discuss the causes and fixes for B3920 2016 GMC Sierra OBDII Code

Submit a New Comment

Code B3920 2016 GMC Sierra comments

No comments found for this page.