AutoCodes – GMC – B1815 GMC

B1815 GMC Code - Driver Seat Recline Forward 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: B1815 GMC indicates Driver Seat Recline Forward 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 759

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

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 B1815 GMC 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 B1815 GMC - Driver Seat Recline Forward Switch Circuit - AutoCodes.com — B1815 GMC Code - Driver Seat Recline Forward Switch Circuit

What does this mean?

What are the Possible Causes of the DTC B1815 GMC?

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 B1815 GMC?

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 B1815 GMC 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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Information for Specific GMC Models

B1815 2014 GMC Sierra — Driver Seat Recline Forward Switch Circuit
B1815 2015 GMC Sierra — Driver Seat Recline Forward Switch Circuit
B1815 2016 GMC Sierra — Driver Seat Recline Forward Switch Circuit
B1815 2017 GMC Sierra — Driver Seat Recline Forward Switch Circuit
B1815 2018 GMC Sierra — Driver Seat Recline Forward Switch Circuit

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 GMC Code

1. What are the common symptoms of OBDII code B1815 GMC?

The common symptoms of OBDII code B1815 GMC, which is related to the Driver Seat Recline Forward Switch Circuit, include issues with adjusting the driver seat's recline forward position.

2. What could cause OBDII code B1815 GMC to trigger?

OBDII code B1815 GMC is typically triggered by a fault in the driver seat recline forward switch circuit, such as a short circuit or an open circuit.

3. How can I diagnose the issue causing OBDII code B1815 GMC?

To diagnose the issue causing OBDII code B1815 GMC, you can start by checking the wiring and connections related to the driver seat recline forward switch. It's also recommended to inspect the switch itself for any signs of damage or malfunction.

4. Is it safe to continue driving with OBDII code B1815 GMC active?

While the driver seat recline forward switch circuit issue may not directly affect the vehicle's drivability, it is recommended to address the problem promptly to ensure the proper functioning of the seat adjustment feature.

5. What are some repair tips for fixing OBDII code B1815 GMC?

Repairing OBDII code B1815 GMC may involve repairing or replacing the driver seat recline forward switch, repairing any damaged wiring or connectors, or resetting the error code using an OBDII scanner.

6. Can OBDII code B1815 GMC be cleared without fixing the underlying issue?

While it is possible to clear OBDII code B1815 GMC using an OBDII scanner, it is important to address the root cause of the issue to prevent the code from reoccurring.

7. How much does it typically cost to repair OBDII code B1815 GMC?

The cost of repairing OBDII code B1815 GMC can vary depending on the extent of the issue and whether any parts need to be replaced. It is advisable to consult a professional mechanic for an accurate cost estimate.

8. Are there any common DIY fixes for OBDII code B1815 GMC?

Some common DIY fixes for OBDII code B1815 GMC may include checking and cleaning the connectors related to the driver seat recline forward switch or replacing the switch if it is visibly damaged.

9. Will OBDII code B1815 GMC cause the airbag light to illuminate?

In some cases, OBDII code B1815 GMC may cause the airbag light to illuminate if the seat adjustment issue is affecting the proper deployment of the airbag system. It is important to address the code promptly to ensure the safety systems are functioning correctly.

10. How long does it take to repair OBDII code B1815 GMC?

The time required to repair OBDII code B1815 GMC can vary depending on the specific issue and the expertise of the person performing the repair. In general, it may take anywhere from 30 minutes to a few hours to diagnose and fix the problem.