Engine-Codes.com
Engine-Codes – GMC – B1820 GMC

B1820 GMC Code - Driver Seat Recline Rearward Switch Circuit

Quick Answer

The B1820 GMC code refers to an issue with the driver seat recline rearward switch circuit in the vehicle. Common causes include Faulty driver seat recline rearward switch, Wiring issues or loose connections in the circuit, Defective seat 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
B1820 GMC indicates Driver Seat Recline Rearward Switch Circuit.
Common causes
Common causes include Faulty driver seat recline rearward switch, Wiring issues or loose connections in the circuit, Defective seat 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 10, 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 B1820 GMC Description

The B1820 GMC code refers to an issue with the driver seat recline rearward switch circuit in the vehicle. This code indicates that there is a malfunction in the circuit responsible for controlling the recline function of the driver's seat. The driver seat recline rearward switch circuit is part of the vehicle's power seat system, allowing the driver to adjust the seat back angle to their comfort.

OBDII Code B1820 GMC - Driver Seat Recline Rearward Switch Circuit
B1820 GMC Code - Driver Seat Recline Rearward Switch Circuit

Common Causes of B1820 GMC

  1. Faulty driver seat recline rearward switch.
  2. Wiring issues or loose connections in the circuit.
  3. Defective seat control module.
  4. Water or moisture damage to the seat controls.
  5. Physical obstruction preventing the seat from reclining properly.

Symptoms of B1820 GMC

  1. Inability to recline the driver's seat backward.
  2. Unresponsive or intermittent operation of the seat recline function.
  3. Strange noises or clicks when trying to adjust the seat back angle.
  4. The seat reclines backward uncontrollably or gets stuck in a certain position.

How to Fix B1820 GMC

  1. Begin by diagnosing the exact cause of the issue using a diagnostic scanner to retrieve the trouble code and identify the faulty component.
  2. Inspect the wiring and connections in the driver seat recline rearward switch circuit for any damage or loose connections. Repair or replace as necessary.
  3. Test the driver seat recline rearward switch to ensure it is functioning correctly. Replace the switch if it is faulty.
  4. If the issue persists, check the seat control module for any defects or malfunctions. Replace the module if needed.
  5. After making the necessary repairs, clear the trouble code from the vehicle's system and test the driver's seat recline functionality to ensure it is working properly.

Cost to Fix B1820 GMC

The typical repair costs for addressing the B1820 GMC code can vary depending on the specific cause of the issue and the cost of parts and labor. On average, the repair for this problem can range from $150 to $300, including parts and labor. However, it is essential to note that diagnosis time and labor rates at auto repair shops can vary based on several factors. It is advisable to consult with a professional mechanic or local repair shop to get a more precise estimate based on your vehicle make and model. Additionally, rates may be higher at dealerships or metropolitan areas, while independent shops may offer lower prices for the repair.

What does this mean?

Tech Notes for B1820 GMC









User Submitted Video

Need more information about the B1820 GMC code?

Need more information on how to fix the B1820 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1820 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

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 B1820 GMC Code

1. What are common symptoms of OBDII code B1820 GMC related to the Driver Seat Recline Rearward Switch Circuit?

- Common symptoms include the inability to adjust the driver seat to recline rearward or intermittent functionality of the seat recline feature.

2. What are possible causes of OBDII code B1820 GMC for the Driver Seat Recline Rearward Switch Circuit?

- Possible causes include a faulty driver seat recline rearward switch, damaged wiring or connectors in the circuit, or a malfunctioning seat control module.

3. How can I diagnose the issue causing OBDII code B1820 GMC for the Driver Seat Recline Rearward Switch Circuit?

- Diagnose the issue by inspecting the wiring and connectors for any visible damage, testing the functionality of the recline rearward switch, and using a diagnostic scan tool to check for fault codes in the seat control module.

4. Can I repair OBDII code B1820 GMC related to the Driver Seat Recline Rearward Switch Circuit myself?

- Depending on your level of automotive repair experience, you may be able to repair the issue yourself by replacing the faulty switch, repairing damaged wiring, or resetting the seat control module. However, if unsure, it's best to consult a professional mechanic.

5. Are there any simple troubleshooting steps I can take for OBDII code B1820 GMC before seeking professional help?

- Yes, you can start by checking the fuse related to the driver seat controls, ensuring the switch is securely connected, and testing the switch for continuity using a multimeter.

6. Will OBDII code B1820 GMC for the Driver Seat Recline Rearward Switch Circuit cause any safety concerns?

- While the code may not pose an immediate safety risk, having non-functional seat adjustments can affect your driving comfort and potentially impact your driving posture, leading to discomfort during long drives.

7. How urgent is it to address OBDII code B1820 GMC related to the Driver Seat Recline Rearward Switch Circuit?

- It is recommended to address the issue promptly to maintain the functionality and comfort of the driver seat. Ignoring the problem may lead to further damage or inconvenience while driving.

8. Can a faulty seat control module cause OBDII code B1820 GMC for the Driver Seat Recline Rearward Switch Circuit?

- Yes, a malfunctioning seat control module can trigger the B1820 code if it fails to communicate properly with the recline rearward switch or if there are internal faults within the module.

9. Are there any specific vehicle models under GMC that are more prone to experiencing OBDII code B1820 for the Driver Seat Recline Rearward Switch Circuit?

- The B1820 code related to the driver seat recline rearward switch circuit can occur in various GMC models equipped with power adjustable driver seats, such as the GMC Sierra, Yukon, Acadia, and Terrain.

10. How can I prevent OBDII code B1820 GMC from occurring again after repairing the issue with the Driver Seat Recline Rearward Switch Circuit?

- To prevent the code from reoccurring, ensure proper installation of any replacement components, regularly check the condition of the wiring and connectors, and avoid putting excessive pressure on the seat controls during use.

Discuss the causes and fixes for B1820 GMC OBDII Code

Submit a New Comment

Code B1820 GMC comments

No comments found for this page.