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Engine-Codes – GMC – B051E 2015 GMC Sierra

B051E 2015 GMC Sierra Code - Assist Step Disable Switch Circuit

Quick Answer

The B051E diagnostic trouble code (DTC) for a 2015 GMC Sierra relates to the Assist Step Disable Switch Circuit. Common causes include Faulty disable switch, Wiring 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
B051E 2015 GMC Sierra indicates Assist Step Disable Switch Circuit.
Common causes
Common causes include Faulty disable switch, Wiring 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 17, 2024
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Code B051E 2015 GMC Sierra Description

The B051E diagnostic trouble code (DTC) for a 2015 GMC Sierra relates to the Assist Step Disable Switch Circuit. This code indicates that there is a malfunction in the circuit responsible for controlling the assist steps on the vehicle. Assist steps are retractable steps that extend when the vehicle door is opened to assist passengers in entering and exiting the vehicle. The disable switch allows the driver to manually control the operation of the assist steps. When this circuit malfunctions, it can lead to issues with the operation of the assist steps, potentially causing inconvenience and safety concerns for passengers.

OBDII Code B051E 2015 GMC Sierra - Assist Step Disable Switch Circuit
B051E 2015 GMC Sierra Code - Assist Step Disable Switch Circuit

Common Causes of B051E 2015 GMC Sierra

  1. Faulty disable switch
  2. Wiring issues in the circuit
  3. BCM malfunction
  4. Corrosion in electrical connections
  5. Physical damage to the assist steps

Symptoms of B051E 2015 GMC Sierra

  1. Inoperative assist steps
  2. Check engine light illuminated on the dashboard
  3. Difficulty in entering or exiting the vehicle
  4. Battery drain issues

How to Fix B051E 2015 GMC Sierra

  1. Begin by conducting a visual inspection of the disable switch and wiring to check for any visible damage or corrosion.
  2. Test the disable switch using a multimeter to determine if it is functioning correctly.
  3. Inspect the wiring harness for any breaks or shorts that may be affecting the circuit.
  4. If no issues are found with the switch or wiring, the BCM may need to be reprogrammed or replaced.
  5. Clear the DTC from the vehicle's computer system using a diagnostic scanner after completing the repair.

Cost to Fix B051E 2015 GMC Sierra

The cost of repairing the Assist Step Disable Switch Circuit can vary depending on the specific cause of the issue. In general, the cost of parts for this repair can range from $50 to $200, while labor costs can range from $100 to $300. However, it's important to note that these are rough estimates, and actual costs may vary based on factors such as location, vehicle make and model, and the shop's labor rates. It's recommended to consult with a qualified mechanic or auto repair shop for a more accurate cost estimate.

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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 B051E 2015 GMC Sierra Code

1. What does the OBDII code B051E for a 2015 GMC Sierra mean?

The code B051E indicates a problem with the Assist Step Disable Switch Circuit in the vehicle.

2. What are the common symptoms of the B051E OBDII code in a 2015 GMC Sierra?

Common symptoms of the B051E code may include inoperative assist steps, illuminated warning lights on the dashboard, or a disabled assist step switch.

3. What are the possible causes of the B051E OBDII code in a 2015 GMC Sierra?

Potential causes of the B051E code can include a faulty assist step disable switch, damaged wiring or connectors in the circuit, or a malfunctioning control module.

4. How can I diagnose the B051E OBDII code in my 2015 GMC Sierra?

Diagnosing the B051E code typically involves inspecting the assist step disable switch, checking the wiring and connectors for damage, and using a scan tool to retrieve specific diagnostic trouble codes.

5. How can I repair the Assist Step Disable Switch Circuit issue associated with the B051E code in a 2015 GMC Sierra?

Repairing the B051E code may involve replacing the faulty assist step disable switch, repairing damaged wiring or connectors, or reprogramming the control module if necessary.

6. Can I continue driving my 2015 GMC Sierra with the B051E OBDII code present?

It is not recommended to continue driving your vehicle with the B051E code active, as it may affect the functionality of the assist steps and potentially lead to safety issues.

7. How much does it typically cost to repair the B051E OBDII code in a 2015 GMC Sierra?

The cost of repairing the B051E code can vary depending on the specific cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

8. Is the B051E OBDII code a common problem in 2015 GMC Sierra vehicles?

The B051E code related to the Assist Step Disable Switch Circuit is not as common as some other OBDII codes, but it can still occur in 2015 GMC Sierra models, particularly as the vehicle ages.

9. Can I reset the B051E OBDII code in my 2015 GMC Sierra myself?

While you may be able to clear the B051E code temporarily by disconnecting the vehicle's battery, it is recommended to diagnose and repair the underlying issue to prevent the code from reoccurring.

10. Is it necessary to visit a dealership for repairs related to the B051E OBDII code in a 2015 GMC Sierra?

While a dealership may have specialized knowledge of GMC vehicles, an experienced mechanic or repair shop should be able to diagnose and repair the B051E code in a 2015 GMC Sierra effectively.

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