AutoCodes – GMC – B1363 GMC

B1363 GMC Code - Driver Belt Pretensioner Short to Ground

Quick Answer

When the ignition switch is turned to ON, the Sensing and Diagnostic Module (SDM) will perform turn-on test to diagnose critical malfunctions within SDM itself. Common causes include Faulty Driver Belt Pretensioner, Driver Belt Pretensioner harness is open or shorted, Driver Belt 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: B1363 GMC indicates Driver Belt Pretensioner Short to Ground.
Common causes: Common causes include Faulty Driver Belt Pretensioner, Driver Belt Pretensioner harness is open or shorted, Driver Belt 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 866

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 Mar 15, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1363 GMC Description

When the ignition switch is turned to ON, the Sensing and Diagnostic Module (SDM) will perform turn-on test to diagnose critical malfunctions within SDM itself.
Upon passing these test ignition and deployment loop voltages are measured to ensure that they are within their normal voltage ranges. The SDM monitors the voltages at the driver low and the passenger low to detect shorts to ground or voltage in the deploy loops.
The SDM checks the wiring connection to the driver belt pretensioner by letting the infinitesimal current flow through the internal circuit and verify the resistance.

OBDII Code B1363 GMC - Driver Belt Pretensioner Short to Ground - AutoCodes.com — B1363 GMC Code - Driver Belt Pretensioner Short to Ground

What does this mean?

What are the Possible Causes of the DTC B1363 GMC?

Faulty Driver Belt Pretensioner
Driver Belt Pretensioner harness is open or shorted
Driver Belt Pretensioner circuit poor electrical connection

How to Fix the DTC B1363 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 B1363 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 B1363 GMC code?

Need more information on how to fix the B1363 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1363 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 B1363 GMC Code

1. What are the common symptoms of OBDII code B1363 GMC (Driver Belt Pretensioner Short to Ground)?

The common symptoms include the airbag warning light illuminating on the dashboard, the airbag system not functioning properly, and potential issues with the driver's seatbelt pretensioner.

2. What are the possible causes of OBDII code B1363 GMC?

Possible causes of this code include wiring issues, a short to ground in the driver belt pretensioner circuit, a faulty pretensioner unit, or a malfunctioning airbag control module.

3. How can I diagnose OBDII code B1363 GMC?

Diagnosing this code typically involves using a diagnostic scanner to retrieve the specific fault code, inspecting the wiring and connections in the driver belt pretensioner circuit, and testing the pretensioner unit for continuity and proper operation.

4. Can I drive my vehicle with OBDII code B1363 GMC?

It is not recommended to drive the vehicle with this code present, as it indicates a potential safety issue with the driver's seatbelt pretensioner system. It's best to address the problem promptly to ensure the airbag system functions correctly in the event of a collision.

5. How do I repair OBDII code B1363 GMC?

Repairs for this code may involve repairing or replacing damaged wiring, addressing any short to ground issues in the circuit, replacing the driver belt pretensioner unit if necessary, or reprogramming the airbag control module.

6. Can I reset OBDII code B1363 GMC without fixing the issue?

While you can clear the code using a diagnostic scanner, it's important to address the underlying issue causing the fault code. Resetting the code without fixing the problem may lead to continued safety risks and potential airbag system malfunctions.

7. How much does it cost to repair OBDII code B1363 GMC?

The cost of repairs for this code can vary depending on the specific cause of the issue, the extent of the damage, and whether any parts need to be replaced. It's recommended to consult with a qualified mechanic for an accurate diagnosis and repair estimate.

8. Is OBDII code B1363 GMC a common issue in GMC vehicles?

While not extremely common, this code can occur in GMC vehicles with advanced airbag systems that include driver belt pretensioners. Proper maintenance and regular inspection of the airbag system can help prevent issues like this from arising.

9. Are there any safety risks associated with OBDII code B1363 GMC?

Yes, there are potential safety risks associated with this code, as it indicates a fault in the driver's seatbelt pretensioner system. If left unresolved, it could compromise the effectiveness of the airbag system in the event of a collision.

10. How long does it take to repair OBDII code B1363 GMC?

The repair time for this code can vary depending on the complexity of the issue, the availability of parts, and the mechanic's expertise. In some cases, repairs can be completed within a few hours, but more extensive issues may take longer to resolve.