AutoCodes – GMC – B3927 GMC

B3927 GMC Code - Incorrect Environmental Identifier Received from Electronic Brake Control 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 Electronic Brake Control Module (EBCM), Electronic Brake Control Module harness is open or shorted, Electronic Brake Control 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: B3927 GMC indicates Incorrect Environmental Identifier Received from Electronic Brake Control Module.
Common causes: Common causes include Faulty Electronic Brake Control Module (EBCM), Electronic Brake Control Module harness is open or shorted, Electronic Brake Control 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 1,233

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 B3927 GMC 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 B3927 GMC - Incorrect Environmental Identifier Received from Electronic Brake Control Module - AutoCodes.com — B3927 GMC Code - Incorrect Environmental Identifier Received from Electronic Brake Control Module

What does this mean?

What are the Possible Causes of the DTC B3927 GMC?

Faulty Electronic Brake Control Module (EBCM)
Electronic Brake Control Module harness is open or shorted
Electronic Brake Control Module circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B3927 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 B3927 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.

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Information for Specific GMC Models

B3927 2014 GMC Sierra — Incorrect Environmental Identifier Received from Electronic Brake Control Module
B3927 2015 GMC Sierra — Incorrect Environmental Identifier Received from Electronic Brake Control Module
B3927 2016 GMC Sierra — Incorrect Environmental Identifier Received from Electronic Brake Control Module
B3927 2017 GMC Sierra — Incorrect Environmental Identifier Received from Electronic Brake Control Module
B3927 2018 GMC Sierra — Incorrect Environmental Identifier Received from Electronic Brake Control Module

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 B3927 GMC Code

1. What are the common symptoms of OBDII code B3927 GMC?

The common symptoms of code B3927 include the illumination of the ABS warning light, traction control issues, and potential loss of communication with the electronic brake control module.

2. What could cause the OBDII code B3927 GMC to appear?

This code usually appears due to a faulty electronic brake control module, damaged wiring harnesses, or communication errors between modules in the vehicle.

3. How can I diagnose the cause of OBDII code B3927 GMC?

Diagnosing this code involves using a diagnostic scanner to retrieve the trouble codes, checking the wiring harness for any damage, and performing a thorough inspection of the electronic brake control module.

4. Can I still drive my vehicle with OBDII code B3927 GMC?

It is not recommended to drive your vehicle with this code present, as it may affect the proper functioning of the electronic brake control module and compromise the vehicle's safety systems.

5. Is it safe to reset the OBDII code B3927 GMC without addressing the underlying issue?

Resetting the code without addressing the underlying issue is not recommended, as the problem may persist and potentially lead to further complications with the vehicle's braking system.

6. How can I repair OBDII code B3927 GMC?

Repairing this code involves fixing any damaged wiring harnesses, replacing the electronic brake control module if necessary, and ensuring proper communication between vehicle modules.

7. Are there any DIY tips for fixing OBDII code B3927 GMC?

While some basic troubleshooting steps can be taken, diagnosing and repairing this code often require specialized tools and expertise, so it is advisable to consult a professional mechanic.

8. Can a software update fix OBDII code B3927 GMC?

In some cases, a software update provided by the manufacturer may address communication issues between modules and resolve the code, but this depends on the specific vehicle and situation.

9. How much does it cost to fix OBDII code B3927 GMC?

The cost of fixing this code can vary depending on the underlying cause, the extent of the repairs needed, and labor rates in your area. It is recommended to obtain quotes from different mechanics for an accurate estimate.

10. Will OBDII code B3927 GMC affect my vehicle's emissions or performance?

While this code is related to the electronic brake control module, it can indirectly impact your vehicle's performance and emissions if left unresolved, so it is important to address it promptly.