AutoCodes – GMC – B3928 2015 GMC Sierra

B3928 2015 GMC Sierra Code - Incorrect Environmental Identifier Received from Telematics Communication Interface 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 Telematics Communication Interface Control Module, Telematics Communication Interface Control Module harness is open or shorted, Telematics Communication Interface 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: B3928 2015 GMC Sierra indicates Incorrect Environmental Identifier Received from Telematics Communication Interface Control Module.
Common causes: Common causes include Faulty Telematics Communication Interface Control Module, Telematics Communication Interface Control Module harness is open or shorted, Telematics Communication Interface 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 220

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 B3928 2015 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 B3928 2015 GMC Sierra - Incorrect Environmental Identifier Received from Telematics Communication Interface Control Module - AutoCodes.com — B3928 2015 GMC Sierra Code - Incorrect Environmental Identifier Received from Telematics Communication Interface Control Module

What does this mean?

What are the Possible Causes of the DTC B3928 2015 GMC Sierra?

Faulty Telematics Communication Interface Control Module
Telematics Communication Interface Control Module harness is open or shorted
Telematics Communication Interface Control Module circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B3928 2015 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 B3928 2015 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.

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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 B3928 2015 GMC Sierra Code

1. What are the common symptoms of OBDII code B3928 on a 2015 GMC Sierra?

The common symptoms of OBDII code B3928 include issues with the telematics system, such as loss of communication or incorrect environmental identifiers.

2. What does the OBDII code B3928 indicate on a 2015 GMC Sierra?

OBDII code B3928 indicates that the Telematics Communication Interface Control Module has received an incorrect environmental identifier.

3. What are the possible causes of OBDII code B3928 on a 2015 GMC Sierra?

Possible causes of OBDII code B3928 include a faulty Telematics Communication Interface Control Module, wiring issues, or software glitches within the system.

4. How can I diagnose OBDII code B3928 on my 2015 GMC Sierra?

Diagnosing OBDII code B3928 typically involves using a diagnostic scanner to retrieve the code and then inspecting the telematics system components for any visible damage or connectivity issues.

5. Can OBDII code B3928 on a 2015 GMC Sierra be fixed without professional help?

While some basic checks like inspecting wiring connections can be done without professional help, diagnosing and repairing more complex issues related to OBDII code B3928 may require the expertise of a trained mechanic.

6. Is it safe to continue driving with OBDII code B3928 present on a 2015 GMC Sierra?

It is generally not recommended to continue driving with OBDII code B3928 present, as it may affect the proper functioning of the telematics system and potentially lead to other issues.

7. How much does it typically cost to repair OBDII code B3928 on a 2015 GMC Sierra?

The cost of repairing OBDII code B3928 can vary depending on the root cause of the issue, but it may involve replacing the Telematics Communication Interface Control Module or addressing wiring issues, which can range from moderate to high costs.

8. Are there any preventative measures to avoid OBDII code B3928 on a 2015 GMC Sierra?

To prevent OBDII code B3928, regular maintenance checks on the telematics system and addressing any software updates recommended by the manufacturer may help avoid potential issues.

9. Can a DIY enthusiast with some automotive experience repair OBDII code B3928 on a 2015 GMC Sierra?

A DIY enthusiast with some automotive experience may be able to perform basic checks and inspections related to OBDII code B3928, but more complex diagnostic and repair tasks may require professional assistance.

10. How long does it typically take to repair OBDII code B3928 on a 2015 GMC Sierra?

The repair time for OBDII code B3928 can vary based on the underlying cause and the complexity of the repair needed, ranging from a few hours to a full day or more, depending on the extent of the issue.