AutoCodes – GMC – B0065 GMC

B0065 GMC Code - Left Front/Driver Pretensioner Deployment Loop Open

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: B0065 GMC indicates Left Front/Driver Pretensioner Deployment Loop Open.
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 2,404

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Sep 28, 2020

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code B0065 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 B0065 GMC - Left Front/Driver Pretensioner Deployment Loop Open - AutoCodes.com — B0065 GMC Code - Left Front/Driver Pretensioner Deployment Loop Open

What does this mean?

What are the Possible Causes of the DTC B0065 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 B0065 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 does this mean?

Code Tech Notes

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0065 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 B0065 GMC code?

Need more information on how to fix the B0065 GMC code? Get Access to Factory Service Manuals

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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 B0065 GMC Code

1. What are the common symptoms of OBDII code B0065 GMC (Left Front/Driver Pretensioner Deployment Loop Open)?

The common symptoms include the airbag warning light illuminating on the dashboard and the possibility of the airbag system not deploying properly in the event of a collision.

2. What can cause the OBDII code B0065 GMC to trigger?

This code is typically triggered by issues such as a faulty driver pretensioner, damaged wiring in the pretensioner system, or a poor connection in the circuit.

3. How serious is the OBDII code B0065 GMC?

This code indicates a potential safety issue with the driver's side pretensioner system, which could affect the proper deployment of the airbag. It is important to address this issue promptly to ensure the airbag system functions correctly in the event of an accident.

4. Can I continue driving with the OBDII code B0065 GMC active?

It is not recommended to continue driving with this code active, as it indicates a problem with the airbag system. It is best to have the issue diagnosed and repaired by a qualified technician as soon as possible.

5. How can I diagnose the OBDII code B0065 GMC?

Diagnosing this code typically involves using a scan tool to read the fault codes stored in the vehicle's computer system, as well as conducting a visual inspection of the driver pretensioner system and related wiring.

6. What are some repair tips for resolving the OBDII code B0065 GMC?

Repair tips may include checking and repairing any damaged wiring, ensuring all connections are secure, and replacing the driver pretensioner if necessary. It is advisable to follow the manufacturer's repair procedures for this specific issue.

7. Is it possible to reset the OBDII code B0065 GMC without repairing the issue?

While clearing the fault code may temporarily turn off the warning light, the underlying issue causing the code will still persist. It is best to address the root cause of the problem to ensure the airbag system functions correctly.

8. Can I repair the OBDII code B0065 GMC myself?

Repairing this code may require specialized knowledge and tools, so it is recommended to have the issue diagnosed and repaired by a qualified automotive technician to ensure the proper functioning of the airbag system.

9. Are there any recalls related to the OBDII code B0065 GMC?

Recalls related to this specific OBDII code may vary by vehicle model and year. It is advisable to check with the manufacturer or a dealership to see if there are any recalls or technical service bulletins related to this issue.

10. How much does it typically cost to repair the OBDII code B0065 GMC?

The cost of repairing this code can vary depending on the underlying issue causing the fault. It is best to consult with a professional technician for an accurate diagnosis and repair estimate.