AutoCodes – GMC – B3150 2018 GMC Sierra

B3150 2018 GMC Sierra Code - Driver Door Lock Switch Circuit

Quick Answer

The Body Control Module (BCM) monitors the voltage level of the door lock and door unlock signal circuits. Common causes include Faulty Driver Door Lock Switch, Driver Door Lock Switch harness is open or shorted, Driver Door Lock Switch 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: B3150 2018 GMC Sierra indicates Driver Door Lock Switch Circuit.
Common causes: Common causes include Faulty Driver Door Lock Switch, Driver Door Lock Switch harness is open or shorted, Driver Door Lock Switch 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 215

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 11, 2023

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
Add Comment

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

Code B3150 2018 GMC Sierra Description

The Body Control Module (BCM) monitors the voltage level of the door lock and door unlock signal circuits. When the driver door lock switch is in the open position, the voltage level in the signal circuit will be near 12 V. When the driver door lock switch is pressed to the lock or unlock position, the voltage level in the appropriate signal circuit will drop to 0 V and the BCM will detect the voltage drop and command the door latches to perform the requested lock or unlock command. The Diagnostic Trouble Code (DTC) will be set when the BCM detects a short to ground in the switch circuit.

OBDII Code B3150 2018 GMC Sierra - Driver Door Lock Switch Circuit - AutoCodes.com — B3150 2018 GMC Sierra Code - Driver Door Lock Switch Circuit

What does this mean?

What are the Possible Causes of the DTC B3150 2018 GMC Sierra?

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

How to Fix the DTC B3150 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 does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B3150 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 B3150 2018 GMC Sierra code?

Need more information on how to fix the B3150 2018 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B3150 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 B3150 2018 GMC Sierra Code

1. What does the OBDII code B3150 mean on a 2018 GMC Sierra?

B3150 indicates an issue with the Driver Door Lock Switch Circuit, which may involve a malfunction in the wiring, switch, or related components.

2. What are common symptoms of the B3150 code in a 2018 GMC Sierra?

Common symptoms include the driver door lock not functioning, the inability to lock/unlock the door using the switch, or intermittent operation of the lock.

3. What causes the B3150 code to appear in a 2018 GMC Sierra?

Potential causes include a faulty driver door lock switch, damaged wiring or connectors, a short or open circuit, or an issue with the body control module (BCM).

4. How can I diagnose the B3150 code on my 2018 GMC Sierra?

Begin by visually inspecting the wiring and connectors for damage, test the driver door lock switch for proper operation, and use a scan tool to check for related data or further codes.

5. Can the B3150 code affect other door locks in my 2018 GMC Sierra?

Typically, the code only relates to the driver door lock circuit, but in some cases, it could interfere with overall locking system functionality if the BCM is involved.

6. Is it safe to drive with the B3150 code active in my 2018 GMC Sierra?

Yes, it is generally safe to drive, but the driver door lock may not function properly, which could be inconvenient or pose a security risk.

7. How do I fix the B3150 code on a 2018 GMC Sierra?

Repairs may involve replacing the driver door lock switch, repairing damaged wiring or connectors, or reprogramming or replacing the body control module if necessary.

8. How much does it cost to fix the B3150 code on a 2018 GMC Sierra?

Repair costs can range from $50 to $300, depending on whether the issue is a simple wiring repair or a replacement of the lock switch or body control module.

9. Can a weak battery cause the B3150 code in a 2018 GMC Sierra?

While unlikely, electrical issues like a weak or failing battery can sometimes cause false codes or intermittent circuit problems.

10. Do I need a professional mechanic to fix the B3150 code on my 2018 GMC Sierra?

If you have basic automotive knowledge and tools, you can perform simple inspections and repairs. For more complex issues like BCM programming, a professional mechanic is recommended.