AutoCodes – GMC – B0016 GMC

B0016 GMC Code - Left Roof Rail Deployment Loop Stage 1

Quick Answer

During a side or 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 an inflatable restraint module. Common causes include Faulty Left Roof Rail Module, Left Roof Rail Module harness is open or shorted, Left Roof Rail Module 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: B0016 GMC indicates Left Roof Rail Deployment Loop Stage 1.
Common causes: Common causes include Faulty Left Roof Rail Module, Left Roof Rail Module harness is open or shorted, Left Roof Rail Module 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 5,159

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 Oct 05, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B0016 GMC Description

During a side or 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 an inflatable restraint module. There are 2 shorting bars used within the module connector which will short together both high and low circuits, when the connector is disconnected. This will help to prevent unwanted deployment of the inflator module during servicing.

OBDII Code B0016 GMC - Left Roof Rail Deployment Loop Stage 1 - AutoCodes.com — B0016 GMC Code - Left Roof Rail Deployment Loop Stage 1

What does this mean?

What are the Possible Causes of the DTC B0016 GMC?

Faulty Left Roof Rail Module
Left Roof Rail Module harness is open or shorted
Left Roof Rail Module circuit poor electrical connection
Faulty Sensing and Diagnostic Module (SDM)

How to Fix the DTC B0016 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

B0016:01 Left Roof Rail Deployment Loop Stage 1 Short to Battery
B0016:02 Left Roof Rail Deployment Loop Stage 1 Short to Ground
B0016:04 Left Roof Rail Deployment Loop Stage 1 Open
B0016:0D Left Roof Rail Deployment Loop Stage 1 High Resistance
B0016:0E Left Roof Rail Deployment Loop Stage 1 Low Resistance

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0016 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 B0016 GMC code?

Need more information on how to fix the B0016 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0016 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 B0016 GMC Code

1. What are the common symptoms of OBDII code B0016 GMC?

The common symptoms of OBDII code B0016 GMC include the airbag warning light illuminating on the dashboard and a message indicating an issue with the left roof rail deployment loop stage 1.

2. What does the OBDII code B0016 GMC indicate?

OBDII code B0016 GMC indicates a problem with the left roof rail deployment loop stage 1 in the airbag system.

3. What are the possible causes of OBDII code B0016 GMC?

Possible causes of OBDII code B0016 GMC include a faulty left roof rail airbag sensor, damaged wiring in the airbag system, or a malfunctioning airbag control module.

4. How can I diagnose the issue related to OBDII code B0016 GMC?

Diagnosing OBDII code B0016 GMC typically involves using a scan tool to retrieve the specific fault codes, inspecting the left roof rail airbag sensor and related wiring, and performing any necessary tests recommended by the manufacturer.

5. Can I continue driving with OBDII code B0016 GMC present?

It is not recommended to continue driving with OBDII code B0016 GMC present, as it indicates a potential issue with the airbag system that could affect its functionality in the event of a collision.

6. How can I repair OBDII code B0016 GMC?

Repairing OBDII code B0016 GMC may involve replacing the left roof rail airbag sensor, repairing or replacing damaged wiring, or reprogramming the airbag control module. It is recommended to consult with a qualified mechanic for proper diagnosis and repair.

7. Is it safe to reset the OBDII code B0016 GMC without fixing the underlying issue?

Resetting the OBDII code B0016 GMC without addressing the underlying issue may temporarily turn off the warning light, but the problem will persist and could potentially compromise the airbag system's effectiveness.

8. How much does it typically cost to repair OBDII code B0016 GMC?

The cost of repairing OBDII code B0016 GMC can vary depending on the specific cause of the issue, parts required for the repair, and labor costs. It is advisable to obtain quotes from different repair shops to get an accurate estimate.

9. Can I prevent OBDII code B0016 GMC from occurring in the future?

While some causes of OBDII code B0016 GMC are unavoidable, regular maintenance and inspections of the airbag system can help prevent issues that may trigger this fault code.

10. How crucial is it to address OBDII code B0016 GMC promptly?

Addressing OBDII code B0016 GMC promptly is crucial for ensuring the proper functioning of the airbag system, which plays a critical role in protecting occupants in the event of a collision. Delaying repairs could compromise safety.