AutoCodes – GMC – B243B 2017 GMC Sierra

B243B 2017 GMC Sierra Code - Right Front Seat Heating Switch

Quick Answer

The Body Control Module (BCM) detects an internal fault with the seat heating switch. Common causes include Faulty Right Front Seat Heating Switch, Right Front Seat Heating Switch harness is open or shorted, Right 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
B243B 2017 GMC Sierra indicates Right Front Seat Heating Switch.
Common causes
Common causes include Faulty Right Front Seat Heating Switch, Right Front Seat Heating Switch harness is open or shorted, Right 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 663
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Apr 26, 2023
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Code B243B 2017 GMC Sierra 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 B243B 2017 GMC Sierra - Right Front Seat Heating Switch - AutoCodes.com
B243B 2017 GMC Sierra Code - Right Front Seat Heating Switch

What are the Possible Causes of the DTC B243B 2017 GMC Sierra?

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

How to Fix the DTC B243B 2017 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B243B 2017 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.

Need more information about the B243B 2017 GMC Sierra code?

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Need Help with the Code?

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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 B243B 2017 GMC Sierra Code

1. What does the OBDII code B243B mean on a 2017 GMC Sierra?

The B243B code indicates an issue with the right front seat heating switch circuit, often related to electrical faults or component failure.

2. What are the symptoms of code B243B in a 2017 GMC Sierra?

Common symptoms include the right front seat heater not functioning, the heating switch being unresponsive, or intermittent operation of the seat heater.

3. What causes the B243B code to appear?

The code can be caused by a faulty seat heating switch, damaged wiring, poor electrical connections, or a malfunction in the seat control module.

4. Can I still drive my GMC Sierra with code B243B active?

Yes, the code does not affect drivability, but the right front seat heater may not work until the issue is resolved.

5. How do you diagnose the B243B code on a 2017 GMC Sierra?

Diagnosis typically involves checking the seat heating switch, inspecting the wiring and connectors for damage, and testing the seat control module for proper functionality.

6. How do you fix the B243B code on a GMC Sierra?

Repairs may include replacing the right front seat heating switch, repairing damaged wiring, cleaning or tightening electrical connections, or reprogramming the seat control module.

7. Is the B243B code specific to the right front seat?

Yes, this code specifically refers to the right front seat heating switch and does not affect other seat heaters.

8. Can a blown fuse cause the B243B code?

While a blown fuse could interrupt power to the seat heater system, the code specifically points to the heating switch circuit, so fuse-related issues are less common but worth checking.

9. How much does it cost to fix the B243B code on a 2017 GMC Sierra?

Repair costs can range from $50 to $300, depending on whether the issue is related to the switch, wiring, or control module.

10. Can I clear the B243B code without fixing the issue?

You can clear the code with an OBDII scanner, but it will likely return if the underlying issue is not addressed.

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