AutoCodes – GMC – B3924 2017 GMC Sierra

B3924 2017 GMC Sierra Code - Incorrect Environmental Identifier Received from Inflatable Restraint Sensing and Diagnostic Module

Quick Answer

When certain modules are programmed and configured during installation, the module learns a specific environment identifier which is unique to the vehicle. Common causes include Faulty Inflatable Restraint Sensing and Diagnostic Module, Inflatable Restraint Sensing and Diagnostic Module harness is open or shorted, Inflatable Restraint Sensing and Diagnostic 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: B3924 2017 GMC Sierra indicates Incorrect Environmental Identifier Received from Inflatable Restraint Sensing and Diagnostic Module.
Common causes: Common causes include Faulty Inflatable Restraint Sensing and Diagnostic Module, Inflatable Restraint Sensing and Diagnostic Module harness is open or shorted, Inflatable Restraint Sensing and Diagnostic 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 170

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 16, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3924 2017 GMC Sierra Description

When certain modules are programmed and configured during installation, the module learns a specific environment identifier which is unique to the vehicle. The environment identifier is used to prevent the swapping of control modules between vehicles. The Body Control Module (BCM) is the keeper of the environment identifier. The instrument cluster, electronic brake control module, Heating, Ventilation, and Air Conditioning (HVAC) Control Module, inflatable restraint sensing and diagnostic module, and telematics communication interface control module each learn the environment identifier during their configuration process. During vehicle operation, the BCM sends the immobilizer identifier as a challenge and each module responds to the challenge by sending the environment identifier back to the BCM. If the BCM sends an incorrect immobilizer identifier or a specific number of incorrect environment identifiers are received, vehicle starting is disabled.
The Diagnostic Trouble Code (DTC) sets when the control module's environment identifier does not match the environment identifier stored by the BCM.

OBDII Code B3924 2017 GMC Sierra - Incorrect Environmental Identifier Received from Inflatable Restraint Sensing and Diagnostic Module - AutoCodes.com — B3924 2017 GMC Sierra Code - Incorrect Environmental Identifier Received from Inflatable Restraint Sensing and Diagnostic Module

What does this mean?

What are the Possible Causes of the DTC B3924 2017 GMC Sierra?

Faulty Inflatable Restraint Sensing and Diagnostic Module
Inflatable Restraint Sensing and Diagnostic Module harness is open or shorted
Inflatable Restraint Sensing and Diagnostic Module circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B3924 2017 GMC Sierra?

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 B3924 2017 GMC Sierra 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 B3924 2017 GMC Sierra code?

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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 B3924 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code B3924 in a 2017 GMC Sierra?

The common symptoms include the airbag warning light illuminating on the dashboard and potential non-deployment of the airbags during a collision.

2. What does the OBDII code B3924 for a 2017 GMC Sierra mean?

The code indicates that the Inflatable Restraint Sensing and Diagnostic Module has detected an incorrect environmental identifier.

3. What are the possible causes of OBDII code B3924 in a 2017 GMC Sierra?

Possible causes include a malfunction in the sensing and diagnostic module, wiring issues, faulty connections, or a problem with the airbag system's environmental sensors.

4. How serious is OBDII code B3924 in a 2017 GMC Sierra?

This code is considered serious as it relates to the proper functioning of the airbag system, which is crucial for occupant safety in the event of a collision.

5. Can I continue driving my 2017 GMC Sierra with OBDII code B3924?

It is not recommended to drive the vehicle with this code present, as the airbag system may not deploy correctly in the event of an accident.

6. How can OBDII code B3924 in a 2017 GMC Sierra be diagnosed?

Diagnosis typically involves using a diagnostic scanner to retrieve the specific code, followed by thorough inspection of the airbag system components and related wiring.

7. What are the repair options for OBDII code B3924 in a 2017 GMC Sierra?

Repair options may include repairing or replacing the Inflatable Restraint Sensing and Diagnostic Module, addressing any wiring issues, and ensuring proper connections in the airbag system.

8. Is it safe to reset the OBDII code B3924 in a 2017 GMC Sierra without fixing the underlying issue?

It is not recommended to reset the code without addressing the underlying problem, as it may compromise the proper functioning of the airbag system and endanger occupants.

9. Can a DIY enthusiast fix OBDII code B3924 in a 2017 GMC Sierra?

While some basic troubleshooting steps can be taken by enthusiasts, it is recommended to consult a professional mechanic for proper diagnosis and repair of airbag system issues.

10. How much does it typically cost to repair OBDII code B3924 in a 2017 GMC Sierra?

The cost of repair can vary depending on the specific cause of the issue, but it may involve parts replacement, wiring repairs, and labor costs, which can add up to a few hundred dollars.