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Engine-Codes – GMC – B001B 2018 GMC Sierra

B001B 2018 GMC Sierra Code - Passenger Seat Belt Anchor Pretensioner Deployment Loop

Quick Answer

The B001B diagnostic trouble code (DTC) on a 2018 GMC Sierra relates to the Passenger Seat Belt Anchor Pretensioner Deployment Loop. Common causes include Wiring harness damage or corrosion, Faulty pretensioner unit, Loose or damaged connections. 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
B001B 2018 GMC Sierra indicates Passenger Seat Belt Anchor Pretensioner Deployment Loop.
Common causes
Common causes include Wiring harness damage or corrosion, Faulty pretensioner unit, Loose or damaged connections.
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 14, 2024
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Code B001B 2018 GMC Sierra Description

The B001B diagnostic trouble code (DTC) on a 2018 GMC Sierra relates to the Passenger Seat Belt Anchor Pretensioner Deployment Loop. This code indicates a potential issue with the seat belt pretensioner system on the passenger side of the vehicle. The pretensioner is a safety feature that activates in the event of a collision to tighten the seat belt and reduce the forward movement of the occupant, thus minimizing the risk of injury.

OBDII Code B001B 2018 GMC Sierra - Passenger Seat Belt Anchor Pretensioner Deployment Loop
B001B 2018 GMC Sierra Code - Passenger Seat Belt Anchor Pretensioner Deployment Loop

Common Causes of B001B 2018 GMC Sierra

  1. Wiring harness damage or corrosion.
  2. Faulty pretensioner unit.
  3. Loose or damaged connections.
  4. Sensor malfunction.
  5. Impact or collision that triggered the pretensioner deployment.

Symptoms of B001B 2018 GMC Sierra

  1. Airbag warning light illuminated on the dashboard.
  2. Passenger seat belt warning light flashing or staying on.
  3. Audible chime indicating a seat belt issue.
  4. Inability to properly fasten the passenger seat belt.

How to Fix B001B 2018 GMC Sierra

  1. Use a diagnostic scan tool to retrieve the specific fault code.
  2. Inspect the wiring harness for any damage or corrosion.
  3. Test the pretensioner unit for proper functionality.
  4. Check and secure all connections related to the pretensioner system.
  5. Clear the fault code and perform a test drive to ensure the issue is resolved.

Cost to Fix B001B 2018 GMC Sierra

The cost of repairing a B001B code on a 2018 GMC Sierra can vary depending on the specific cause of the issue and the labor rates in your area. Typically, the parts required for this repair, such as a new pretensioner unit or wiring harness, can range from $200 to $500. The labor costs for diagnosing and repairing the problem can add an additional $150 to $300. Overall, you can expect the total repair cost to be in the range of $350 to $800. It's important to note that these are rough estimates, and actual costs may vary based on the extent of the issue and the rates charged by your chosen repair facility. Be sure to consult with a professional technician for a more accurate quote.

What does this mean?

Tech Notes for B001B 2018 GMC Sierra

B001B:01 Passenger Seat Belt Anchor Pretensioner Deployment Loop Short to Battery

B001B:02 Passenger Seat Belt Anchor Pretensioner Deployment Loop Short to Ground

B001B:04 Passenger Seat Belt Anchor Pretensioner Deployment Loop Open

B001B:0D Passenger Seat Belt Anchor Pretensioner Deployment Loop High Resistance

B001B:0E Passenger Seat Belt Anchor Pretensioner Deployment Loop Low Resistance

Need more information about the B001B 2018 GMC Sierra code?

Need more information on how to fix the B001B 2018 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B001B 2018 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

  • Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
  • Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
  • Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
  • Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.

Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

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 B001B 2018 GMC Sierra Code

1. What does the OBDII code B001B for a 2018 GMC Sierra mean?

The OBDII code B001B indicates a fault in the Passenger Seat Belt Anchor Pretensioner Deployment Loop system.

2. What are some common symptoms of the B001B code in a 2018 GMC Sierra?

Common symptoms may include the airbag warning light illuminating on the dashboard and possible issues with the passenger seat belt pretensioner.

3. What are possible causes of the B001B code in a 2018 GMC Sierra?

Causes of the B001B code can range from a faulty seat belt pretensioner, damaged wiring, or a malfunction in the deployment loop system.

4. How can I diagnose the B001B code in my 2018 GMC Sierra?

To diagnose the B001B code, it is recommended to use an OBDII scanner to retrieve the specific fault codes and then inspect the seat belt pretensioner system for any visible damage or issues.

5. Can I still drive my 2018 GMC Sierra with the B001B code present?

It is not advisable to drive the vehicle with the B001B code as it indicates a potential safety issue with the passenger seat belt pretensioner system.

6. How can I repair the B001B code in my 2018 GMC Sierra?

Repairing the B001B code may involve replacing the faulty seat belt pretensioner, repairing damaged wiring, or fixing any issues with the deployment loop system as recommended by a qualified mechanic.

7. Is it safe to reset the B001B code in my 2018 GMC Sierra without fixing the underlying issue?

Resetting the B001B code without addressing the root cause can be dangerous as it may compromise the effectiveness of the passenger seat belt pretensioner system in the event of a collision.

8. How much does it typically cost to repair the B001B code in a 2018 GMC Sierra?

The cost of repairing the B001B code can vary depending on the specific issue, but it may involve parts and labor expenses that can range from a few hundred to over a thousand dollars.

9. Can a DIY enthusiast fix the B001B code in a 2018 GMC Sierra?

While some basic troubleshooting steps can be performed by a DIY enthusiast, the complexity of the seat belt pretensioner system may require the expertise of a professional mechanic for a proper repair.

10. How often does the B001B code occur in 2018 GMC Sierra vehicles?

The B001B code may occur infrequently in 2018 GMC Sierra vehicles, but if it does, prompt attention and repair are crucial to ensure the safety of the vehicle's occupants.

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