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C0379 2015 Chevrolet Silverado Code - Front Axle Switch Circuit

Quick Answer

The C0379 diagnostic trouble code (DTC) for a 2015 Chevrolet Silverado relates to the Front Axle Switch Circuit. Common causes include Electrical faults in the front axle switch circuit, Damaged or corroded wiring harness, Faulty connectors or poor electrical connections. 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
C0379 2015 Chevrolet Silverado indicates Front Axle Switch Circuit.
Common causes
Common causes include Electrical faults in the front axle switch circuit, Damaged or corroded wiring harness, Faulty connectors or poor electrical connections.
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 15, 2024
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Code C0379 2015 Chevrolet Silverado Description

The C0379 diagnostic trouble code (DTC) for a 2015 Chevrolet Silverado relates to the Front Axle Switch Circuit. This code indicates that there is a malfunction in the circuit that controls the front axle engagement system. In vehicles equipped with four-wheel drive (4WD) or all-wheel drive (AWD), the front axle switch is responsible for engaging or disengaging the front axle as needed. This is crucial for proper operation of the 4WD/AWD system, as it allows the vehicle to switch between two-wheel drive and four-wheel drive modes.

OBDII Code C0379 2015 Chevrolet Silverado - Front Axle Switch Circuit
C0379 2015 Chevrolet Silverado Code - Front Axle Switch Circuit

Common Causes of C0379 2015 Chevrolet Silverado

  1. Electrical faults in the front axle switch circuit.
  2. Damaged or corroded wiring harness.
  3. Faulty connectors or poor electrical connections.
  4. Malfunctioning front axle actuator.
  5. Defective front axle switch.

Symptoms of C0379 2015 Chevrolet Silverado

  1. Difficulty engaging or disengaging four-wheel drive mode.
  2. Illumination of the 4WD/AWD warning light on the dashboard.
  3. Unusual noises coming from the front axle area.
  4. Limited traction or difficulty driving in slippery conditions.
  5. Inability to switch between two-wheel drive and four-wheel drive modes.

How to Fix C0379 2015 Chevrolet Silverado

  1. Begin by conducting a thorough inspection of the front axle switch circuit, including the wiring harness, connectors, front axle actuator, and switch.
  2. Test the front axle actuator and switch for proper functionality using a multimeter or scan tool.
  3. Replace any damaged wiring, connectors, or components as needed.
  4. Clear the DTC from the vehicle's onboard computer using a scan tool.
  5. Test drive the vehicle to ensure that the front axle engagement system is operating correctly.

Cost to Fix C0379 2015 Chevrolet Silverado

The typical repair costs for addressing the C0379 DTC on a 2015 Chevrolet Silverado can range from $200 to $500, depending on the specific components that need to be replaced and the labor involved. This estimate includes parts and labor, but actual costs may vary based on the location, vehicle make and model, and the rates of the auto repair shop. It's advisable to consult with a professional mechanic for a more accurate cost estimate based on your specific circumstances. Keep in mind that diagnosis time and labor rates at auto repair shops can vary, with hourly rates typically ranging between $80 and $150.

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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 C0379 2015 Chevrolet Silverado Code

1. What does the OBDII code C0379 mean on a 2015 Chevrolet Silverado?

C0379 refers to a fault in the Front Axle Switch Circuit, indicating an issue with the system that controls engagement of the front axle in four-wheel-drive (4WD) modes.

2. What are the common symptoms of the C0379 code on a Chevy Silverado?

Common symptoms include the 4WD system failing to engage or disengage, a Service 4WD message on the dashboard, or illuminated warning lights.

3. What causes the C0379 code to appear on a 2015 Silverado?

Potential causes include a faulty front axle actuator, damaged wiring or connectors in the front axle switch circuit, or a malfunctioning transfer case control module (TCCM).

4. Can I still drive my 2015 Chevrolet Silverado with the C0379 code?

While you can typically still drive the vehicle, the 4WD system may not function as intended, which can impact performance in off-road or slippery conditions.

5. How do I diagnose the C0379 code on my Silverado?

Diagnosis involves checking for damaged wiring or connectors in the front axle circuit, testing the front axle actuator for proper operation, and scanning the TCCM for additional fault codes.

6. What is the role of the front axle actuator in the C0379 code?

The front axle actuator engages or disengages the front axle for 4WD operation. A malfunctioning actuator can trigger the C0379 code.

7. How do I fix the C0379 code on my 2015 Chevrolet Silverado?

Repairs may include replacing the front axle actuator, repairing damaged wiring or connectors, or reprogramming or replacing the TCCM if necessary.

8. Is the C0379 code specific to 4WD-equipped Silverados?

Yes, this code is specific to vehicles equipped with a 4WD system, as it relates to the front axle engagement mechanism.

9. How much does it cost to repair the C0379 code on a Chevy Silverado?

Repair costs vary depending on the issue but can range from $150 to $500, primarily for replacing the front axle actuator or repairing wiring.

10. Can a software update resolve the C0379 code on a 2015 Silverado?

In some cases, a software update for the TCCM may resolve the issue if the fault is related to a programming error.

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