AutoCodes – GMC – B3924 2016 GMC Sierra

B3924 2016 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 2016 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 175

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 2016 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 2016 GMC Sierra - Incorrect Environmental Identifier Received from Inflatable Restraint Sensing and Diagnostic Module - AutoCodes.com — B3924 2016 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 2016 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 2016 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 2016 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 2016 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 2016 GMC Sierra Code

1. What does the OBDII code B3924 mean on a 2016 GMC Sierra?

The B3924 code indicates that the Inflatable Restraint Sensing and Diagnostic Module (SDM) has received an incorrect environmental identifier, typically related to a communication or configuration issue.

2. What are the common symptoms of code B3924 in a 2016 GMC Sierra?

Symptoms may include the airbag warning light illuminating on the dashboard, a stored fault code, or issues with airbag functionality.

3. What causes the code B3924 to trigger on a GMC Sierra?

This code is often caused by a mismatch in communication between the SDM and other vehicle modules, incorrect programming, damaged wiring, or a faulty SDM.

4. Is it safe to drive a 2016 GMC Sierra with the B3924 code?

While the truck is typically drivable, the airbag system may not function correctly in the event of a collision, which can compromise safety.

5. How do you diagnose the B3924 code on a 2016 GMC Sierra?

Diagnosis involves scanning the vehicle with a professional OBDII scanner, checking for any communication errors, inspecting module programming, and examining wiring for damage or loose connections.

6. Can a faulty Inflatable Restraint Sensing and Diagnostic Module cause the B3924 code?

Yes, a faulty SDM can cause this code if it fails to process or transmit the correct environmental identifier.

7. How do you fix the B3924 code on a 2016 GMC Sierra?

Repairs may include reprogramming or recalibrating the SDM, repairing damaged wiring, addressing module communication issues, or replacing the SDM if necessary.

8. What tools are needed to repair the B3924 code?

Youâ€™ll need a professional-grade OBDII scanner capable of accessing airbag system codes and performing module programming or calibration, as well as basic electrical testing tools.

9. Can clearing the code B3924 resolve the issue permanently?

Clearing the code may temporarily turn off the airbag light, but if the underlying issue isnâ€™t addressed, the code will return.

10. Should I take my 2016 GMC Sierra to a professional for the B3924 code?

Yes, because the airbag system is critical for safety, itâ€™s recommended to have a professional diagnose and repair the issue to ensure proper functionality.