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Engine-Codes – GMC – B1815 2018 GMC Sierra

B1815 2018 GMC Sierra Code - Driver Seat Recline Forward Switch Circuit

Quick Answer

The B1815 diagnostic trouble code (DTC) for a 2018 GMC Sierra relates to the driver seat recline forward switch circuit. Common causes include Damaged or frayed wiring in the driver seat recline forward switch circuit, Faulty driver seat recline switch, Loose or corroded electrical connectors in the circuit. 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
B1815 2018 GMC Sierra indicates Driver Seat Recline Forward Switch Circuit.
Common causes
Common causes include Damaged or frayed wiring in the driver seat recline forward switch circuit, Faulty driver seat recline switch, Loose or corroded electrical connectors in the circuit.
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 14, 2024
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Code B1815 2018 GMC Sierra Description

The B1815 diagnostic trouble code (DTC) for a 2018 GMC Sierra relates to the driver seat recline forward switch circuit. This code indicates that there is a malfunction in the circuit responsible for controlling the forward recline function of the driver's seat. The driver seat recline forward switch circuit is part of the vehicle's power seat system, allowing the driver to adjust the seat position for comfort while driving. When this circuit is not functioning correctly, it can lead to issues with adjusting the seat position, potentially causing discomfort for the driver and affecting their ability to operate the vehicle safely.

OBDII Code B1815 2018 GMC Sierra - Driver Seat Recline Forward Switch Circuit
B1815 2018 GMC Sierra Code - Driver Seat Recline Forward Switch Circuit

Common Causes of B1815 2018 GMC Sierra

  1. Damaged or frayed wiring in the driver seat recline forward switch circuit.
  2. Faulty driver seat recline switch.
  3. Loose or corroded electrical connectors in the circuit.
  4. Malfunctioning power seat control module.
  5. Short circuit or open circuit in the circuit.

Symptoms of B1815 2018 GMC Sierra

  1. Inability to adjust the driver's seat forward or backward.
  2. Unresponsive or erratic behavior from the driver seat recline switch.
  3. Unusual noises or grinding sounds when attempting to adjust the seat position.
  4. The driver's seat getting stuck in a certain position.
  5. Warning light illuminated on the dashboard related to the power seat system.

How to Fix B1815 2018 GMC Sierra

  1. Begin by conducting a thorough visual inspection of the wiring, connectors, and switch in the driver seat recline forward switch circuit.
  2. Use a multimeter to test the continuity and resistance of the circuit components to identify any faulty parts.
  3. Replace any damaged wiring, connectors, or the recline switch as needed.
  4. If the issue persists, diagnose the power seat control module for any faults and replace if necessary.
  5. Clear the DTC from the PCM memory using a diagnostic scan tool after completing the repairs.

Cost to Fix B1815 2018 GMC Sierra

The typical repair costs for addressing the B1815 code on a 2018 GMC Sierra can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the cost of parts for replacing wiring, connectors, or the recline switch can range from $50 to $200. Labor costs at auto repair shops typically range from $80 to $150 per hour, and the total repair time may vary depending on the complexity of the issue. Therefore, the total cost of repairing the driver seat recline forward switch circuit could range from $150 to $500 or more, including parts and labor. It is advisable to consult with a professional mechanic or dealership for a more accurate cost estimate based on the specific circumstances of the vehicle.

What does this mean?

Tech Notes for B1815 2018 GMC Sierra









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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 B1815 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code B1815 in a 2018 GMC Sierra related to the driver seat recline forward switch circuit?

The common symptoms include the inability to adjust the driver seat recline forward position.

2. What are the possible causes of OBDII code B1815 in a 2018 GMC Sierra affecting the driver seat recline forward switch circuit?

Possible causes may include a faulty driver seat recline forward switch, wiring issues, or a malfunctioning control module.

3. How can I diagnose the issue related to OBDII code B1815 in a 2018 GMC Sierra for the driver seat recline forward switch circuit?

You can diagnose the problem by checking the wiring connections, testing the driver seat recline forward switch for continuity, and using a scan tool to retrieve specific error codes.

4. Is it safe to continue driving my 2018 GMC Sierra with OBDII code B1815 affecting the driver seat recline forward switch circuit?

It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to ensure optimal functionality of the driver seat controls.

5. Can I repair OBDII code B1815 in a 2018 GMC Sierra related to the driver seat recline forward switch circuit on my own?

If you have experience with automotive electrical systems and the necessary tools, you may be able to repair the issue yourself by replacing the faulty switch or addressing wiring problems.

6. How much does it typically cost to repair OBDII code B1815 in a 2018 GMC Sierra concerning the driver seat recline forward switch circuit?

The cost of repairing this code can vary depending on the exact cause of the issue, but it may range from $50 to $200 for parts and labor.

7. Are there any temporary solutions to address OBDII code B1815 in a 2018 GMC Sierra affecting the driver seat recline forward switch circuit?

One temporary solution could be manually adjusting the driver seat position until the underlying issue is properly diagnosed and repaired.

8. Will resetting the vehicle's computer system clear OBDII code B1815 in a 2018 GMC Sierra related to the driver seat recline forward switch circuit?

Resetting the computer system may temporarily clear the code, but if the root cause is not addressed, the code is likely to reappear.

9. How long does it typically take to repair OBDII code B1815 in a 2018 GMC Sierra associated with the driver seat recline forward switch circuit?

The repair time can vary depending on the exact cause and the complexity of the repair, but it may take anywhere from 1 to 3 hours to complete.

10. Can OBDII code B1815 in a 2018 GMC Sierra impacting the driver seat recline forward switch circuit lead to any other related issues?

While the code specifically relates to the driver seat recline forward switch circuit, unresolved electrical issues can potentially cause other problems in the vehicle's electrical system over time.

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