AutoCodes – GMC – B0064 GMC

B0064 GMC Code - Left Front/Driver Pretensioner Deployment Loop Resistance Low

Quick Answer

The driver seat belt pretensioner deployment loop consists of a seat belt pretensioner - LF and the seat belt pretensioner - LF high and low circuits. Common causes include Faulty Left Front/Driver Pretensioner, Left Front/Driver Pretensioner harness is open or shorted, Left Front/Driver Pretensioner 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: B0064 GMC indicates Left Front/Driver Pretensioner Deployment Loop Resistance Low.
Common causes: Common causes include Faulty Left Front/Driver Pretensioner, Left Front/Driver Pretensioner harness is open or shorted, Left Front/Driver Pretensioner 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 1,624

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 Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B0064 GMC Description

The driver seat belt pretensioner deployment loop consists of a seat belt pretensioner - LF and the seat belt pretensioner - LF high and low circuits. A shorting bar used within the seat belt pretensioner connector shorts together both the seat belt pretensioner high and low circuits when the connector is disconnected. This will help to prevent unwanted deployment of the pretensioner during servicing. During a frontal crash of sufficient force the inflatable restraint Sensing and Diagnostic Module (SDM) will allow current to flow through the deployment loop in order to deploy the seat belt pretensioner. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage. If a malfunction is detected, a Diagnostic Trouble Code (DTC) will be stored in memory.

OBDII Code B0064 GMC - Left Front/Driver Pretensioner Deployment Loop Resistance Low - AutoCodes.com — B0064 GMC Code - Left Front/Driver Pretensioner Deployment Loop Resistance Low

What does this mean?

What are the Possible Causes of the DTC B0064 GMC?

Faulty Left Front/Driver Pretensioner
Left Front/Driver Pretensioner harness is open or shorted
Left Front/Driver Pretensioner circuit poor electrical connection
Faulty Sensing and Diagnostic Module (SDM)

How to Fix the DTC B0064 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 B0064 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 B0064 GMC code?

Need more information on how to fix the B0064 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0064 GMC 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 B0064 GMC Code

1. What are the common symptoms of OBDII code B0064 GMC?

The common symptoms of OBDII code B0064 GMC include the airbag warning light illuminating on the dashboard and potential non-deployment of the driver's side airbag during a collision.

2. What does the OBDII code B0064 GMC indicate?

OBDII code B0064 GMC indicates a problem with the left front/driver pretensioner deployment loop resistance being too low, which can affect the proper functioning of the driver's side airbag system.

3. What are the possible causes of OBDII code B0064 GMC?

Possible causes of OBDII code B0064 GMC include a faulty driver pretensioner, damaged wiring or connectors in the deployment loop circuit, or issues with the airbag control module.

4. How can I diagnose the issue related to OBDII code B0064 GMC?

Diagnosing the issue related to OBDII code B0064 GMC typically involves using a scan tool to retrieve the specific fault code, inspecting the driver pretensioner and related wiring for damage, and testing the deployment loop resistance to identify the source of the problem.

5. Can I drive my vehicle with OBDII code B0064 GMC?

It is not recommended to drive your vehicle with OBDII code B0064 GMC present, as it indicates a potential safety issue with the driver's side airbag system. It is advisable to address the problem promptly to ensure the proper functioning of the airbag in case of an accident.

6. How can OBDII code B0064 GMC be repaired?

Repairing OBDII code B0064 GMC may involve replacing the faulty driver pretensioner, repairing or replacing damaged wiring or connectors in the deployment loop circuit, or resetting the airbag control module after addressing the root cause of the low resistance issue.

7. Is it safe to reset the OBDII code B0064 GMC without fixing the underlying problem?

Resetting OBDII code B0064 GMC without fixing the underlying problem may temporarily clear the warning light but will not address the safety issue with the driver's side airbag system. It is important to diagnose and repair the root cause of the code to ensure proper airbag functionality.

8. Can a DIY enthusiast fix OBDII code B0064 GMC at home?

While some experienced DIY enthusiasts may be able to diagnose and repair OBDII code B0064 GMC at home, dealing with airbag systems and safety components requires specialized knowledge and tools. It is recommended to consult a professional mechanic for proper diagnosis and repair.

9. How much does it cost to fix OBDII code B0064 GMC at a repair shop?

The cost of fixing OBDII code B0064 GMC at a repair shop can vary depending on the specific cause of the issue, the need for parts replacement, and the labor rates in your area. It is advisable to obtain quotes from different shops for an accurate estimate.

10. Can OBDII code B0064 GMC recur after being repaired?

OBDII code B0064 GMC can recur if the root cause of the issue is not properly addressed during the repair process. It is important to ensure that all components related to the left front/driver pretensioner deployment loop resistance are thoroughly inspected and repaired to prevent the code from reoccurring.