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B3145 2017 GMC Sierra Code - Passenger Door Unlock Switch Circuit

Quick Answer

The B3145 diagnostic trouble code (DTC) for the 2017 GMC Sierra relates to the passenger door unlock switch circuit. Common causes include Faulty passenger door unlock switch, Wiring or connector issues in the circuit, BCM malfunction. 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
B3145 2017 GMC Sierra indicates Passenger Door Unlock Switch Circuit.
Common causes
Common causes include Faulty passenger door unlock switch, Wiring or connector issues in the circuit, BCM malfunction.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code B3145 2017 GMC Sierra Description

The B3145 diagnostic trouble code (DTC) for the 2017 GMC Sierra relates to the passenger door unlock switch circuit. This code indicates that there is a malfunction in the circuit that controls the passenger door unlock switch. The passenger door unlock switch is a crucial component of the vehicle's electrical system, allowing the driver or passengers to unlock the door with ease. When this circuit malfunctions, it can lead to issues with unlocking the passenger door, potentially causing inconvenience and safety concerns.

OBDII Code B3145 2017 GMC Sierra - Passenger Door Unlock Switch Circuit
B3145 2017 GMC Sierra Code - Passenger Door Unlock Switch Circuit

Common Causes of B3145 2017 GMC Sierra

  1. Faulty passenger door unlock switch
  2. Wiring or connector issues in the circuit
  3. BCM malfunction
  4. Water or moisture damage to the circuit components
  5. Electrical short circuit in the circuit

Symptoms of B3145 2017 GMC Sierra

  1. Inability to unlock the passenger door using the switch
  2. Intermittent or erratic behavior of the passenger door unlock switch
  3. Illumination of the check engine light on the dashboard
  4. Audible clicking or buzzing noise when attempting to unlock the passenger door

How to Fix B3145 2017 GMC Sierra

  1. Begin by diagnosing the specific cause of the issue using a diagnostic scanner to retrieve the DTC and pinpoint the faulty component.
  2. Inspect the passenger door unlock switch for any visible damage or signs of wear. Replace the switch if necessary.
  3. Check the wiring and connectors in the circuit for any damage, corrosion, or loose connections. Repair or replace as needed.
  4. Test the BCM for proper functionality and replace if found to be faulty.
  5. Clear the DTC from the vehicle's memory using the diagnostic scanner and test the passenger door unlock switch to ensure proper operation.

Cost to Fix B3145 2017 GMC Sierra

The typical repair costs for addressing the B3145 DTC on a 2017 GMC Sierra can vary depending on the specific cause of the issue. In general, replacing a faulty passenger door unlock switch may cost between $50 and $100 for the part, with additional labor costs ranging from $80 to $150 per hour. If the issue is related to wiring or BCM malfunction, the repair costs may increase accordingly. It's advisable to consult with a qualified mechanic or auto repair shop to obtain a more accurate estimate based on the specific diagnosis and repair requirements.

What does this mean?

Tech Notes for B3145 2017 GMC Sierra









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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 B3145 2017 GMC Sierra Code

1. What are some common symptoms of OBDII code B3145 on a 2017 GMC Sierra related to the Passenger Door Unlock Switch Circuit?

The common symptoms include the passenger door not unlocking using the interior switch, erratic behavior of the unlock function, or the door unlocking intermittently.

2. What are the potential causes of OBDII code B3145 on a 2017 GMC Sierra?

Possible causes include a faulty passenger door unlock switch, damaged wiring or connectors in the circuit, a malfunctioning body control module (BCM), or a poor electrical connection.

3. How can I diagnose the issue causing OBDII code B3145 on my 2017 GMC Sierra?

You can start by checking the passenger door unlock switch for proper function, inspecting the wiring and connectors for any visible damage, performing a continuity test on the circuit, and using a scan tool to check for BCM codes and data.

4. Is it safe to continue driving my 2017 GMC Sierra with OBDII code B3145 related to the Passenger Door Unlock Switch Circuit?

While it may be safe to drive, it is recommended to address the issue promptly to ensure the proper functioning of the passenger door unlock system, especially for passenger safety and convenience.

5. Can I repair OBDII code B3145 on my 2017 GMC Sierra related to the Passenger Door Unlock Switch Circuit myself?

If you have experience with automotive electrical systems and access to the necessary tools, you may be able to repair the issue yourself by replacing the faulty switch, repairing damaged wiring, or addressing poor connections.

6. Should I reset the OBDII code B3145 on my 2017 GMC Sierra after making repairs to the Passenger Door Unlock Switch Circuit?

Yes, it is advisable to reset the code using a scan tool after making any repairs to clear the error code and see if the issue has been successfully resolved.

7. Are there any specific precautions to take when working on the Passenger Door Unlock Switch Circuit to resolve OBDII code B3145 on a 2017 GMC Sierra?

Ensure the vehicle is turned off, disconnect the battery to prevent electrical shorts, and follow proper safety procedures when handling electrical components to avoid any accidents or damage.

8. What is the typical cost to repair OBDII code B3145 on a 2017 GMC Sierra related to the Passenger Door Unlock Switch Circuit at a professional auto repair shop?

The cost of repairs can vary depending on the exact cause of the issue, but it may range from $100 to $300, including parts and labor.

9. Can a malfunctioning Passenger Door Unlock Switch Circuit leading to OBDII code B3145 impact other electrical systems in my 2017 GMC Sierra?

While the specific impact may vary, a faulty circuit can potentially affect other related systems controlled by the BCM, such as interior lighting, power windows, or door locks.

10. How long does it typically take to repair OBDII code B3145 on a 2017 GMC Sierra related to the Passenger Door Unlock Switch Circuit?

The repair time can vary based on the extent of the issue, but a professional technician may take around 1 to 2 hours to diagnose and repair the problem effectively.

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