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Engine-Codes – GMC – B255D 2018 GMC Sierra

B255D 2018 GMC Sierra Code - Passenger Compartment Lamp Control Circuit

Quick Answer

The B255D diagnostic trouble code (DTC) for the 2018 GMC Sierra relates to the passenger compartment lamp control circuit. Common causes include Faulty passenger compartment lamp, Wiring or connection issues in the lamp control circuit, Defective body control module (BCM). 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
B255D 2018 GMC Sierra indicates Passenger Compartment Lamp Control Circuit.
Common causes
Common causes include Faulty passenger compartment lamp, Wiring or connection issues in the lamp control circuit, Defective body control module (BCM).
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 17, 2024
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Code B255D 2018 GMC Sierra Description

The B255D diagnostic trouble code (DTC) for the 2018 GMC Sierra relates to the passenger compartment lamp control circuit. This code indicates that there is a malfunction in the circuit responsible for controlling the passenger compartment lamp. The passenger compartment lamp is an interior light that illuminates the interior of the vehicle, making it easier for passengers to see and locate items in the dark.

OBDII Code B255D 2018 GMC Sierra - Passenger Compartment Lamp Control Circuit
B255D 2018 GMC Sierra Code - Passenger Compartment Lamp Control Circuit

Common Causes of B255D 2018 GMC Sierra

  1. Faulty passenger compartment lamp
  2. Wiring or connection issues in the lamp control circuit
  3. Defective body control module (BCM)
  4. Corrosion or damage to electrical connectors
  5. Short circuit in the wiring harness

Symptoms of B255D 2018 GMC Sierra

  1. Passenger compartment lamp not turning on when doors are opened
  2. Check engine light illuminated on the dashboard
  3. Interior of the vehicle is dark even when lamp should be on
  4. Inconsistent operation of the passenger compartment lamp

How to Fix B255D 2018 GMC Sierra

  1. Begin by inspecting the passenger compartment lamp to ensure it is functioning properly. Replace the lamp if necessary.
  2. Check the wiring and connections in the lamp control circuit for any signs of damage or corrosion. Repair or replace as needed.
  3. Test the body control module (BCM) to determine if it is sending signals correctly to the lamp. Replace the BCM if it is faulty.
  4. Inspect the wiring harness for any short circuits or damage. Repair or replace the wiring harness as required.
  5. Clear the DTC using a diagnostic scan tool after completing the repairs and test the passenger compartment lamp to ensure it is operating correctly.

Cost to Fix B255D 2018 GMC Sierra

The cost of repairing the B255D code for the passenger compartment lamp control circuit in a 2018 GMC Sierra can vary depending on the specific issue and the labor rates at the auto repair shop. Typically, the cost of parts for this repair can range from $50 to $200, while labor costs can range from $100 to $300. Overall, the total repair cost could be between $150 and $500. It is recommended to check with local auto repair shops for accurate estimates based on your location and vehicle specifics. Keep in mind that rates can vary based on factors such as the complexity of the repair and the need for any additional parts.

What does this mean?

Tech Notes for B255D 2018 GMC Sierra

B255D:01 Passenger Compartment Lamp Control Circuit Short to Battery

B255D:02 Passenger Compartment Lamp Control Circuit Short to Ground

B255D:04 Passenger Compartment Lamp Control Circuit Open

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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 B255D 2018 GMC Sierra Code

1. What are common symptoms of OBDII code B255D in a 2018 GMC Sierra related to the Passenger Compartment Lamp Control Circuit?

The common symptoms include the passenger compartment lamp not turning on or remaining on continuously.

2. What are possible causes of OBDII code B255D in a 2018 GMC Sierra?

Possible causes include a faulty passenger compartment lamp switch, wiring issues, a blown fuse, or a malfunctioning control module.

3. How can I diagnose the cause of OBDII code B255D in my 2018 GMC Sierra?

You can start by checking the passenger compartment lamp switch, inspecting the wiring for any damage, testing the fuse, and using a diagnostic scanner to check the control module.

4. Can I fix OBDII code B255D in my 2018 GMC Sierra by replacing the passenger compartment lamp myself?

Yes, you can replace the passenger compartment lamp yourself if it is determined to be the cause of the code. Make sure to follow the manufacturer's instructions and safety precautions.

5. Is it safe to continue driving my 2018 GMC Sierra with OBDII code B255D related to the Passenger Compartment Lamp Control Circuit?

It is generally safe to drive the vehicle with this code, but you may experience inconvenience due to the malfunctioning passenger compartment lamp.

6. How much does it typically cost to repair OBDII code B255D in a 2018 GMC Sierra at a dealership or repair shop?

The cost of repair can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.

7. Can a loose connection be the reason behind OBDII code B255D in a 2018 GMC Sierra?

Yes, a loose or poor connection in the wiring related to the passenger compartment lamp control circuit can trigger this diagnostic trouble code.

8. Will disconnecting the battery reset OBDII code B255D in my 2018 GMC Sierra?

Disconnecting the battery may temporarily reset the code, but it is recommended to diagnose and repair the underlying issue to prevent the code from reoccurring.

9. Are there any recalls or technical service bulletins related to OBDII code B255D in a 2018 GMC Sierra?

You can check with GMC customer service or visit their official website to see if there are any recalls or technical service bulletins related to this specific OBDII code.

10. Does OBDII code B255D in a 2018 GMC Sierra affect the vehicle's overall performance or safety?

This code typically does not affect the vehicle's performance or safety directly, but it is essential to address the underlying issue to ensure all systems are functioning correctly.

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