AutoCodes – GMC – B389A 2014 GMC Sierra

B389A 2014 GMC Sierra Code - Environment Identification

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 Body Control Module (BCM), Body Control Module harness is open or shorted, Body 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: B389A 2014 GMC Sierra indicates Environment Identification.
Common causes: Common causes include Faulty Body Control Module (BCM), Body Control Module harness is open or shorted, Body 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 194

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B389A 2014 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 immobilizer identifier was broadcast by the BCM.

OBDII Code B389A 2014 GMC Sierra - Environment Identification - AutoCodes.com — B389A 2014 GMC Sierra Code - Environment Identification

What does this mean?

What are the Possible Causes of the DTC B389A 2014 GMC Sierra?

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

How to Fix the DTC B389A 2014 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 B389A 2014 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 B389A 2014 GMC Sierra code?

Need more information on how to fix the B389A 2014 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B389A 2014 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 B389A 2014 GMC Sierra Code

1. What does OBDII code B389A for a 2014 GMC Sierra indicate?

The code B389A on a 2014 GMC Sierra relates to Environment Identification.

2. What are the common symptoms of OBDII code B389A in a 2014 GMC Sierra?

Common symptoms of code B389A may include issues with environmental sensor readings or inaccuracies in identifying the vehicle's surroundings.

3. What are the potential causes of OBDII code B389A on a 2014 GMC Sierra?

Potential causes of code B389A can include faulty environmental sensors, wiring issues, or sensor calibration problems.

4. How can I diagnose OBDII code B389A on my 2014 GMC Sierra?

Diagnosing code B389A typically involves checking the environmental sensors, inspecting the wiring connections, and ensuring proper sensor calibration.

5. Can I drive my 2014 GMC Sierra with OBDII code B389A?

It is recommended to address the underlying issue causing code B389A before driving your 2014 GMC Sierra to prevent potential performance issues or further damage.

6. Are there any DIY repair tips for fixing OBDII code B389A on a 2014 GMC Sierra?

DIY repair tips for code B389A may include checking and cleaning sensor connections, ensuring sensor calibration, and verifying the sensor's correct positioning.

7. Will resetting the OBDII system clear code B389A on a 2014 GMC Sierra?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing code B389A is not addressed, the code is likely to reappear.

8. How much does it cost to repair OBDII code B389A on a 2014 GMC Sierra?

The cost to repair code B389A can vary depending on the exact cause of the issue, ranging from a simple sensor adjustment to a sensor replacement.

9. Can extreme weather conditions trigger OBDII code B389A on a 2014 GMC Sierra?

Extreme weather conditions can potentially impact the environmental sensors and trigger code B389A on a 2014 GMC Sierra.

10. Is it necessary to visit a mechanic for OBDII code B389A diagnosis and repair on a 2014 GMC Sierra?

While some DIY steps can be taken to address code B389A, consulting a mechanic is advisable for a thorough diagnosis and proper repair to ensure the issue is resolved effectively.