AutoCodes – GMC – B12A6 2018 GMC Sierra

B12A6 2018 GMC Sierra Code - Info Display Module Internal Malfunction

Quick Answer

The radio communicates with the Info Display Module via serial data. Common causes include Faulty Info Display Module, Info Display Module harness is open or shorted, Info Display Module circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B12A6 2018 GMC Sierra indicates Info Display Module Internal Malfunction.
Common causes: Common causes include Faulty Info Display Module, Info Display Module harness is open or shorted, Info Display Module circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 175

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 29, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B12A6 2018 GMC Sierra Description

The radio communicates with the Info Display Module via serial data. This Diagnostic Trouble Code (DTC) indicates a fault in the Info Display Module. No external circuits are involved.

OBDII Code B12A6 2018 GMC Sierra - Info Display Module Internal Malfunction - AutoCodes.com — B12A6 2018 GMC Sierra Code - Info Display Module Internal Malfunction

What does this mean?

What are the Possible Causes of the DTC B12A6 2018 GMC Sierra?

Faulty Info Display Module
Info Display Module harness is open or shorted
Info Display Module circuit poor electrical connection

How to Fix the DTC B12A6 2018 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 B12A6 2018 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 B12A6 2018 GMC Sierra code?

Need more information on how to fix the B12A6 2018 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B12A6 2018 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 B12A6 2018 GMC Sierra Code

1. What does the OBDII code B12A6 mean on a 2018 GMC Sierra?

It indicates an "Info Display Module Internal Malfunction," meaning the infotainment or display module is experiencing an internal fault.

2. What are the common symptoms of code B12A6 in a 2018 GMC Sierra?

Symptoms include a blank or non-responsive infotainment screen, malfunctioning display controls, or intermittent operation of the information display.

3. What causes the B12A6 code to appear on a 2018 GMC Sierra?

The code is triggered by an internal failure in the infotainment display module, such as hardware defects, software corruption, or communication issues with other vehicle systems.

4. Can a software update fix the B12A6 code?

In some cases, a software update or reprogramming of the infotainment system can resolve the issue if itâ€™s caused by corrupted software. Consult your dealership or a qualified technician.

5. Is the infotainment screen replacement necessary for B12A6?

If the issue is hardware-related, such as a failed circuit board or damaged components, the infotainment screen or module may need to be replaced.

6. Can I drive my 2018 GMC Sierra with code B12A6?

Yes, the vehicle is still drivable, but certain infotainment functions may not work, which could affect convenience and some driver-assist features.

7. How is the B12A6 code diagnosed in a 2018 GMC Sierra?

A technician will use a scan tool to confirm the code, check for related codes, inspect wiring and connections, and possibly perform a module self-test or diagnostic procedure.

8. How much does it cost to repair the B12A6 code on a 2018 GMC Sierra?

Repair costs vary depending on the issue. Software updates may cost $100-$200, while replacing the infotainment module could cost $500-$1,500 or more.

9. Can a loose connection cause the B12A6 code to appear?

Yes, a loose or damaged wiring connection to the info display module can sometimes cause this code. Inspecting and repairing connections may resolve the issue.

10. Should I take my 2018 GMC Sierra to a dealership for B12A6 repairs?

Yes, since the issue involves specialized infotainment components, itâ€™s best to visit a dealership or a certified technician with experience in GM vehicles.