AutoCodes – GMC – B243A GMC

B243A GMC Code - Left Front Seat Heating Switch

Quick Answer

The Body Control Module (BCM) detects an internal fault with the seat heating switch. Common causes include Faulty Left Front Seat Heating Switch, Left Front Seat Heating Switch harness is open or shorted, Left Front Seat Heating 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: B243A GMC indicates Left Front Seat Heating Switch.
Common causes: Common causes include Faulty Left Front Seat Heating Switch, Left Front Seat Heating Switch harness is open or shorted, Left Front Seat Heating 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 503

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 26, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B243A GMC Description

The Body Control Module (BCM) detects an internal fault with the seat heating switch. No external circuits are involved. The Diagnostic Trouble Code (DTC) sets when the BCM detects an internal fault with the seat heating switch.

OBDII Code B243A GMC - Left Front Seat Heating Switch - AutoCodes.com — B243A GMC Code - Left Front Seat Heating Switch

What does this mean?

What are the Possible Causes of the DTC B243A GMC?

Faulty Left Front Seat Heating Switch
Left Front Seat Heating Switch harness is open or shorted
Left Front Seat Heating Switch circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B243A 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B243A 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.

Need more information about the B243A GMC code?

Need more information on how to fix the B243A GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B243A GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

B243A 2014 GMC Sierra — Left Front Seat Heating Switch
B243A 2015 GMC Sierra — Left Front Seat Heating Switch
B243A 2016 GMC Sierra — Left Front Seat Heating Switch
B243A 2017 GMC Sierra — Left Front Seat Heating Switch
B243A 2018 GMC Sierra — Left Front Seat Heating Switch

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 B243A GMC Code

1. What does OBDII code B243A for GMC mean?

The code B243A for GMC refers to an issue with the Left Front Seat Heating Switch.

2. What are some common symptoms of OBDII code B243A?

Common symptoms of code B243A include inoperative left front seat heating, non-responsive heating switch, or a warning light on the dashboard.

3. What could cause the OBDII code B243A to trigger?

The code B243A may be triggered by a faulty left front seat heating switch, wiring issues, a blown fuse, or a malfunction in the heating system.

4. How can I diagnose the cause of OBDII code B243A for GMC?

Diagnosing the cause of code B243A involves checking the left front seat heating switch for functionality, inspecting the wiring for any damage, and testing the heating system components.

5. Can I still drive my GMC with OBDII code B243A?

It is generally safe to drive your GMC with the B243A code, but it is recommended to address the issue promptly to ensure the proper functioning of the left front seat heating system.

6. How can I repair OBDII code B243A on my GMC?

To repair the B243A code, you may need to replace the left front seat heating switch, repair any damaged wiring, replace a blown fuse, or address any underlying issues with the heating system.

7. Can I reset the OBDII code B243A without fixing the underlying issue?

While you can clear the code temporarily, it will likely return if the root cause of the problem is not addressed. It is best to fix the issue to prevent further complications.

8. Are there any DIY tips for troubleshooting OBDII code B243A?

You can start by checking the fuse related to the left front seat heating system, inspecting the wiring for any visible damage, and testing the switch for proper functionality before seeking professional help if needed.

9. How much does it cost to fix OBDII code B243A on a GMC?

The cost of fixing the B243A code can vary depending on the specific issue causing the code, the labor rates in your area, and the parts needed for the repair. It is recommended to obtain a diagnosis from a trusted mechanic for an accurate estimate.

10. Is OBDII code B243A a common issue in GMC vehicles?

The B243A code related to the Left Front Seat Heating Switch may occur in GMC vehicles equipped with heated seats, but its frequency can vary. Proper maintenance and timely repairs can help prevent this issue.