AutoCodes – GMC – B3984 2017 GMC Sierra

B3984 2017 GMC Sierra Code - Device 1 Environment Identifier Not Programmable

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 control module that set the Diagnostic Trouble Code (DTC). 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: B3984 2017 GMC Sierra indicates Device 1 Environment Identifier Not Programmable.
Common causes: Common causes include Faulty control module that set the Diagnostic Trouble Code (DTC).
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 195

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 19, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3984 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 modules between vehicles. The Body Control Module (BCM) is the keeper of the environment identifier. The instrument cluster, electronic brake control module, HVAC control module, inflatable restraint sensing and diagnostic module, Engine Control Module (ECM), and steering column lock module (if equipped) 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 an incorrect environment identifier is programmed, or no environment identifier is programmed.

OBDII Code B3984 2017 GMC Sierra - Device 1 Environment Identifier Not Programmable - AutoCodes.com — B3984 2017 GMC Sierra Code - Device 1 Environment Identifier Not Programmable

What does this mean?

What are the Possible Causes of the DTC B3984 2017 GMC Sierra?

Faulty control module that set the Diagnostic Trouble Code (DTC)

How to Fix the DTC B3984 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 B3984 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 B3984 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 B3984 2017 GMC Sierra Code

1. What does OBDII code B3984 mean for a 2017 GMC Sierra?

The code B3984 on a 2017 GMC Sierra indicates that the Device 1 Environment Identifier is not programmable.

2. What are the common symptoms of OBDII code B3984 in a 2017 GMC Sierra?

Common symptoms of code B3984 may include the inability to program or configure certain vehicle components or systems.

3. What are possible causes of OBDII code B3984 in a 2017 GMC Sierra?

Possible causes of code B3984 in a 2017 GMC Sierra include faulty wiring, a malfunctioning control module, or a communication issue within the vehicle's network.

4. How can I diagnose OBDII code B3984 in a 2017 GMC Sierra?

Diagnosing code B3984 typically involves using a diagnostic scanner to retrieve the code, inspecting the wiring and connections related to the Device 1 Environment Identifier, and testing the control module for proper functionality.

5. Can I still drive my 2017 GMC Sierra with OBDII code B3984?

It is not recommended to drive your 2017 GMC Sierra with an unresolved B3984 code, as it may lead to potential issues with programming critical vehicle systems.

6. How do I repair OBDII code B3984 in my 2017 GMC Sierra?

Repairing code B3984 in a 2017 GMC Sierra may involve repairing or replacing damaged wiring, addressing any issues with the control module, or resolving communication problems within the vehicle's network.

7. Is OBDII code B3984 a serious issue in a 2017 GMC Sierra?

While code B3984 may not directly affect the drivability of your 2017 GMC Sierra, it is still important to address the underlying cause to prevent potential issues with programming and system functionality.

8. Can I reset OBDII code B3984 in my 2017 GMC Sierra with a simple reset tool?

Resetting code B3984 with a simple reset tool may clear the code temporarily, but it is essential to diagnose and address the root cause of the issue to prevent it from reoccurring.

9. Will OBDII code B3984 cause my 2017 GMC Sierra to fail an emissions test?

Code B3984 itself may not directly cause your 2017 GMC Sierra to fail an emissions test, but unresolved issues related to the code could potentially impact the vehicle's emissions performance.

10. How much does it typically cost to repair OBDII code B3984 in a 2017 GMC Sierra?

The cost of repairing code B3984 in a 2017 GMC Sierra can vary depending on the specific cause of the issue, but it may involve labor costs for diagnosis and repair, as well as potential expenses for parts replacement.