AutoCodes – GMC – B1820 2015 GMC Sierra

B1820 2015 GMC Sierra Code - Driver Seat Recline Rearward Switch Circuit

Quick Answer

The Seat Memory Control Module supplies a reference voltage to each signal circuit of the Driver Seat Adjuster Switch. Common causes include Faulty Driver Seat Adjuster Switch, Driver Seat Adjuster Switch harness is open or shorted, Driver Seat Adjuster Switch circuit poor electrical connection. 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 2015 GMC Sierra indicates Driver Seat Recline Rearward Switch Circuit.
Common causes: Common causes include Faulty Driver Seat Adjuster Switch, Driver Seat Adjuster Switch harness is open or shorted, Driver Seat Adjuster Switch circuit poor electrical connection.
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 Popularity 204

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Apr 24, 2023

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code B1820 2015 GMC Sierra Description

The Seat Memory Control Module supplies a reference voltage to each signal circuit of the Driver Seat Adjuster Switch. When the power seat or lumbar switches are pressed, the appropriate signal circuit from the Seat Memory Control Module is pulled low through the switch contacts indicating the power seat command. The Seat Memory Control Module then commands the driver seat or lumbar to move in response to the switch signals. The Diagnostic Trouble Code (DTC) will be set when there is a short to ground on a switch signal circuit.

OBDII Code B1820 2015 GMC Sierra - Driver Seat Recline Rearward Switch Circuit - AutoCodes.com — B1820 2015 GMC Sierra Code - Driver Seat Recline Rearward Switch Circuit

What does this mean?

What are the Possible Causes of the DTC B1820 2015 GMC Sierra?

Faulty Driver Seat Adjuster Switch
Driver Seat Adjuster Switch harness is open or shorted
Driver Seat Adjuster Switch circuit poor electrical connection
Faulty Seat Memory Control Module

How to Fix the DTC B1820 2015 GMC Sierra?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1820 2015 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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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 B1820 2015 GMC Sierra Code

1. What does OBDII code B1820 for a 2015 GMC Sierra indicate?

- OBDII code B1820 specifically relates to the Driver Seat Recline Rearward Switch Circuit in a 2015 GMC Sierra.

2. What are the common symptoms of OBDII code B1820 in a 2015 GMC Sierra?

- Common symptoms include non-functioning or erratic operation of the driver seat recline rearward switch.

3. What are the possible causes of OBDII code B1820 in a 2015 GMC Sierra?

- The code may be triggered by a faulty driver seat recline rearward switch, damaged wiring or connectors, or a malfunctioning control module.

4. How can I diagnose the issue causing OBDII code B1820 in my 2015 GMC Sierra?

- To diagnose the problem, you can perform a visual inspection of the wiring and connectors, test the switch for continuity, and use a scan tool to check for any other related codes.

5. Can I repair OBDII code B1820 in my 2015 GMC Sierra myself?

- Depending on your skills and experience, you may be able to repair the issue yourself by replacing the faulty switch, repairing damaged wiring, or addressing any other identified problems.

6. Is it safe to continue driving my 2015 GMC Sierra with OBDII code B1820?

- It is recommended to address the issue promptly to ensure the proper functioning of the driver seat controls and avoid any potential safety hazards.

7. How much does it typically cost to fix OBDII code B1820 in a 2015 GMC Sierra?

- The cost of repairs can vary depending on the specific cause of the issue, but it may involve replacement parts and labor charges.

8. Can resetting the OBDII system clear code B1820 in my 2015 GMC Sierra?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear.

9. Are there any recalls or technical service bulletins related to OBDII code B1820 for the 2015 GMC Sierra?

- Checking with a GMC dealership or reviewing online resources can help determine if there are any relevant recalls or technical service bulletins related to this code.

10. How can I prevent OBDII code B1820 from appearing in my 2015 GMC Sierra in the future?

- Regular maintenance, prompt repairs of any related issues, and ensuring proper handling of the driver seat controls can help prevent the recurrence of this code.