AutoCodes – GMC – B324A GMC

B324A GMC Code - Rear Cargo Door Unlock Motor Circuit

Quick Answer

When the Body Control Module (BCM) receives a liftgate release command, it will provide voltage to one side of the relay and ground to the other side of the relay. Common causes include Faulty Rear Cargo Door Unlock Motor, Rear Cargo Door Unlock Motor harness is open or shorted, Rear Cargo Door Unlock Motor 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: B324A GMC indicates Rear Cargo Door Unlock Motor Circuit.
Common causes: Common causes include Faulty Rear Cargo Door Unlock Motor, Rear Cargo Door Unlock Motor harness is open or shorted, Rear Cargo Door Unlock Motor 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 647

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 Mar 05, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B324A GMC Description

When the Body Control Module (BCM) receives a liftgate release command, it will provide voltage to one side of the relay and ground to the other side of the relay. This will energize the relay causing the switch side of the relay to close and will then provide B+ voltage to the liftgate latch assembly.

OBDII Code B324A GMC - Rear Cargo Door Unlock Motor Circuit - AutoCodes.com — B324A GMC Code - Rear Cargo Door Unlock Motor Circuit

What does this mean?

What are the Possible Causes of the DTC B324A GMC?

Faulty Rear Cargo Door Unlock Motor
Rear Cargo Door Unlock Motor harness is open or shorted
Rear Cargo Door Unlock Motor circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B324A 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 B324A 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.

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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 B324A GMC Code

1. What are common symptoms of OBDII code B324A GMC (Rear Cargo Door Unlock Motor Circuit)?

- Common symptoms include the rear cargo door failing to unlock or lock properly, unusual noises coming from the door, and the interior lights not working when the door is opened.

2. What are possible causes of OBDII code B324A GMC?

- Possible causes include a faulty rear cargo door unlock motor, damaged wiring or connectors in the circuit, a blown fuse, or a malfunctioning control module.

3. How can I diagnose the issue related to OBDII code B324A GMC?

- You can use a scan tool to read the trouble code and then inspect the rear cargo door unlock motor, wiring, and connectors for any visible damage or corrosion. Testing the circuit with a multimeter may also help pinpoint the issue.

4. Is it safe to continue driving with OBDII code B324A GMC active?

- It is not recommended to continue driving with this code active, as it may lead to inconvenience or safety issues if the rear cargo door cannot be unlocked or locked properly.

5. Can I repair OBDII code B324A GMC myself?

- Depending on your level of automotive expertise, you may be able to repair this code yourself by replacing the rear cargo door unlock motor, repairing damaged wiring, or addressing any other identified issues in the circuit.

6. Are there any tips for repairing OBDII code B324A GMC more efficiently?

- Some tips for efficient repair include checking the fuse related to the rear cargo door circuit first, inspecting for any obvious physical damage, and following a systematic diagnostic approach to locate the exact cause.

7. How much does it typically cost to repair OBDII code B324A GMC at a repair shop?

- The cost of repair can vary depending on the specific cause of the code and labor rates in your area. It is recommended to obtain quotes from reputable repair shops for an accurate estimate.

8. Can OBDII code B324A GMC affect other vehicle systems?

- While this code specifically relates to the rear cargo door unlock motor circuit, it may indirectly affect other systems dependent on the proper functioning of the rear cargo door, such as interior lighting or security features.

9. Will resetting the trouble code make OBDII code B324A GMC disappear permanently?

- Resetting the trouble code may temporarily clear the warning light, but if the underlying issue causing OBDII code B324A GMC is not addressed, the code is likely to reappear once the fault is detected again.

10. How urgent is it to address OBDII code B324A GMC once it appears?

- It is recommended to address OBDII code B324A GMC promptly to avoid potential inconvenience or safety concerns related to the proper operation of the rear cargo door unlock motor circuit.