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

Quick Answer

The B3928 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates that the Telematics Communication Interface Control Module has detected an incorrect environmental identifier. Common causes include Loose or damaged wiring connections to the Telematics Communication Interface Control Module, Faulty environmental sensors, Software glitches in the module's programming. 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 Loose or damaged wiring connections to the Telematics Communication Interface Control Module, Faulty environmental sensors, Software glitches in the module's programming.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 14, 2024
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Code B3928 2017 GMC Sierra Description

The B3928 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates that the Telematics Communication Interface Control Module has detected an incorrect environmental identifier. This means that there is a communication error between the module and the vehicle's environmental sensors, which are responsible for monitoring various environmental factors such as temperature, humidity, and air quality. This issue can impact the vehicle's performance by affecting the accuracy of data received by the module, potentially leading to incorrect readings and improper functioning of related systems.

OBDII Code B3928 2017 GMC Sierra - Incorrect Environmental Identifier Received from Telematics Communication Interface Control Module
B3928 2017 GMC Sierra Code - Incorrect Environmental Identifier Received from Telematics Communication Interface Control Module

Common Causes of B3928 2017 GMC Sierra

  1. Loose or damaged wiring connections to the Telematics Communication Interface Control Module
  2. Faulty environmental sensors
  3. Software glitches in the module's programming
  4. Water damage to the module due to leaks or flooding
  5. Physical damage to the module from impact or vibration

Symptoms of B3928 2017 GMC Sierra

  1. Inaccurate readings on the vehicle's temperature display
  2. HVAC system not responding correctly to environmental changes
  3. Decreased fuel efficiency
  4. Malfunctioning safety features such as automatic headlights or rain-sensing wipers

How to Fix B3928 2017 GMC Sierra

  1. Begin by conducting a thorough inspection of the wiring connections to the Telematics Communication Interface Control Module and environmental sensors. Repair or replace any damaged or loose connections.
  2. Test the environmental sensors to ensure they are functioning properly. Replace any faulty sensors as needed.
  3. Check for any software updates or glitches in the module's programming. Update the software or reprogram the module if necessary.
  4. Inspect the module for any signs of water damage or physical damage. Replace the module if it is compromised.
  5. Clear the DTC from the vehicle's system using a diagnostic scanner after completing the repairs.

Cost to Fix B3928 2017 GMC Sierra

The typical repair costs for addressing the B3928 code on a 2017 GMC Sierra can range from $200 to $500, including parts and labor. However, specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's recommended to check local rates for a more accurate estimate. Keep in mind that rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less.

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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 vehicle’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 doesn’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.

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