AutoCodes – GMC – B1447 GMC

B1447 GMC Code - Backup Power Source

Quick Answer

The Back-up Battery (BUB) provides voltage to the Communication Interface Module (CIM), to be able to successfully place a call in the event of a main battery disconnect during a collision event. Common causes include Faulty Communication Interface Module (CIM), Communication Interface Module (CIM) harness is open or shorted, Communication Interface Module (CIM) 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: B1447 GMC indicates Backup Power Source.
Common causes: Common causes include Faulty Communication Interface Module (CIM), Communication Interface Module (CIM) harness is open or shorted, Communication Interface Module (CIM) 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 941

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 Apr 10, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1447 GMC Description

OBDII Code B1447 GMC - Backup Power Source - AutoCodes.com — B1447 GMC Code - Backup Power Source

What does this mean?

What are the Possible Causes of the DTC B1447 GMC?

Faulty Communication Interface Module (CIM)
Communication Interface Module (CIM) harness is open or shorted
Communication Interface Module (CIM) circuit poor electrical connection

How to Fix the DTC B1447 GMC?

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 B1447 GMC 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 B1447 GMC code?

Need more information on how to fix the B1447 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1447 GMC 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 B1447 GMC Code

1. What does OBDII code B1447 GMC Backup Power Source mean?

The B1447 code indicates a backup power source issue in a GMC vehicle's airbag system.

2. What are common symptoms of OBDII code B1447 GMC?

Common symptoms include the airbag warning light staying illuminated on the dashboard and potential failure of the airbag system.

3. What are the possible causes of OBDII code B1447 GMC?

The code may be triggered by a faulty backup power source module, damaged wiring, or a disconnected or blown fuse related to the airbag system.

4. How can I diagnose OBDII code B1447 GMC?

Diagnosing the code involves using an OBDII scanner to retrieve the code, checking the backup power source module, inspecting the wiring for damage, and verifying the condition of relevant fuses.

5. Can I continue driving with OBDII code B1447 GMC active?

It is not recommended to drive with the B1447 code active, as it indicates a potential issue with the airbag system's backup power source, compromising safety in the event of an accident.

6. How can I repair OBDII code B1447 GMC Backup Power Source?

Repairing the B1447 code typically involves replacing the faulty backup power source module, repairing damaged wiring, and ensuring all related fuses are intact and functional.

7. Is it safe to reset OBDII code B1447 GMC Backup Power Source?

Resetting the code without addressing the underlying issue is not advisable, as it may lead to continued problems with the airbag system. Ensure proper diagnosis and repair before resetting the code.

8. Can a DIY enthusiast fix OBDII code B1447 GMC Backup Power Source?

While some DIY enthusiasts may have the skills to address the code, working on the airbag system requires caution and proper knowledge. It is recommended to consult a professional mechanic for this repair.

9. How much does it cost to repair OBDII code B1447 GMC Backup Power Source?

The cost of repairing the B1447 code can vary depending on the extent of the issue, parts needed for replacement, and labor costs. It is advisable to obtain quotes from reputable auto repair shops.

10. Will OBDII code B1447 GMC reset on its own?

The B1447 code will not reset on its own. It needs to be diagnosed, repaired, and then cleared using an OBDII scanner to reset the code.