AutoCodes – GMC – B3928 2017 GMC Sierra

B3928 2017 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 2017 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 147

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 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 B3928 2017 GMC Sierra - Incorrect Environmental Identifier Received from Telematics Communication Interface Control Module - AutoCodes.com — B3928 2017 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 2017 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 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 B3928 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 B3928 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 B3928 2017 GMC Sierra Code

1. What does the OBDII code B3928 mean on a 2017 GMC Sierra?

B3928 indicates that the vehicleâ€™s telematics communication interface control module has received an incorrect environmental identifier, potentially causing issues with communication or system functionality.

2. What are common symptoms of the B3928 code on a 2017 GMC Sierra?

Common symptoms include OnStar system malfunctions, loss of telematics features, illuminated warning lights, or error messages on the infotainment screen.

3. What causes the B3928 code to appear?

This code is typically caused by a software mismatch, corrupted data, faulty telematics control module, or incorrect programming of the module.

4. Can the B3928 code affect vehicle functionality?

While it usually doesnâ€™t impact critical driving functions, it can disable telematics services like OnStar, navigation updates, or emergency assistance.

5. How is the B3928 code diagnosed?

A technician will use a scan tool to check for stored codes, review live data from the telematics module, and verify the programming or software version of the affected system.

6. Can the B3928 code be fixed by resetting the system?

In some cases, clearing the code and performing a reset may temporarily resolve the issue, but underlying problems like software errors or hardware failures will require further attention.

7. Is the telematics communication interface control module always the problem?

Not necessarily. Wiring issues, poor connections, or a software update failure can also trigger the B3928 code.

8. How much does it cost to repair the B3928 code on a 2017 GMC Sierra?

Costs vary depending on the issue. A software update may cost $100-$200, while replacing the telematics module could range from $500-$1,000, including labor.

9. Can I drive my 2017 GMC Sierra with the B3928 code?

Yes, the vehicle is typically safe to drive, but telematics features like OnStar or emergency services may not function correctly.

10. How can I prevent the B3928 code from occurring?

Keeping the telematics system updated with the latest software and ensuring proper installation or programming during repairs can help prevent this issue.