C0379 2016 GMC Sierra Code - Front Axle Switch Circuit
Quick Answer
The C0379 diagnostic trouble code (DTC) for a 2016 GMC Sierra relates to the Front Axle Switch Circuit. Common causes include Faulty front axle switch, Wiring issues or shorts in the front axle switch circuit, Corrosion or poor connections in the circuit. 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 2016 GMC Sierra indicates Front Axle Switch Circuit.
- Common causes
- Common causes include Faulty front axle switch, Wiring issues or shorts in the front axle switch circuit, Corrosion or poor connections in the circuit.
- 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 C0379 2016 GMC Sierra Description
The C0379 diagnostic trouble code (DTC) for a 2016 GMC Sierra 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, the front axle switch is responsible for engaging or disengaging the front axle to switch between two-wheel drive and four-wheel drive modes. When this circuit malfunctions, it can lead to issues with the vehicle's drivetrain and overall performance.
Common Causes of C0379 2016 GMC Sierra
- Faulty front axle switch
- Wiring issues or shorts in the front axle switch circuit
- Corrosion or poor connections in the circuit
- Defective front axle actuator
- Issues with the transfer case control module
Symptoms of C0379 2016 GMC Sierra
- Difficulty engaging or disengaging four-wheel drive mode
- Illumination of the four-wheel drive indicator light on the dashboard
- Unusual noises coming from the front axle area
- Reduced traction and stability while driving in slippery conditions
- Drivability issues, such as hesitation or jerking when switching between drive modes
How to Fix C0379 2016 GMC Sierra
- Begin by conducting a thorough inspection of the front axle switch circuit, checking for any visible damage or corrosion.
- Test the front axle switch using a multimeter to determine if it is functioning properly.
- Inspect the wiring harness for any signs of damage or shorts, repairing or replacing as necessary.
- Check the front axle actuator for proper operation and replace if faulty.
- If the issue persists, diagnose the transfer case control module for any faults and replace if needed.
Cost to Fix C0379 2016 GMC Sierra
The cost of repairing a Front Axle Switch Circuit issue can vary depending on the specific cause of the problem and the extent of the repairs needed. On average, the parts for this repair can range from $100 to $300, while labor costs can range from $150 to $400. Overall, the total cost for addressing a C0379 DTC in a 2016 GMC Sierra can be estimated to be between $250 and $700. It's important to note that these are rough estimates, and actual costs may vary based on factors such as location, labor rates, and the need for additional repairs. It is recommended to consult with a professional mechanic for a more accurate cost estimate based on your specific situation.
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Frequently Asked Questions about C0379 2016 GMC Sierra Code
What does the OBDII code C0379 mean for a 2016 GMC Sierra?
C0379 indicates a problem with the front axle switch circuit, which is responsible for controlling the operation of the front axle in four-wheel drive systems.
What are common symptoms of the C0379 code?
Common symptoms include the inability to engage four-wheel drive, warning lights on the dashboard, and unusual noises from the front axle area.
What might cause the C0379 code to trigger?
Causes can include a faulty front axle switch, damaged wiring or connectors, a malfunctioning control module, or issues with the front axle itself.
How can I diagnose the C0379 code?
Start by using an OBDII scanner to confirm the code. Inspect the front axle switch, wiring, and connectors for damage. Check for any related codes that could provide additional context.
What repairs are typically needed for a C0379 code?
Repairs may involve replacing the front axle switch, repairing damaged wiring, or addressing issues with the control module or front axle assembly.
Can I drive my GMC Sierra with the C0379 code?
It's not recommended to drive the vehicle if the front axle isn't functioning correctly, as it can affect handling and safety, especially in adverse conditions.
How can I prevent the C0379 code from occurring?
Regular maintenance, including checking the condition of the front axle system and ensuring connections are tight and free of corrosion, can help prevent issues.
Is it safe to clear the C0379 code without repairs?
Clearing the code may temporarily turn off the warning light, but it does not fix the underlying issue and could lead to further damage or unsafe driving conditions.
What should I do if the C0379 code returns after repairs?
If the code reappears, further diagnostics may be necessary. It's advisable to check for additional related codes and inspect the system again for any overlooked issues.
Can the C0379 code affect fuel efficiency?
While the C0379 code itself may not directly impact fuel efficiency, driving in four-wheel drive when not needed can lead to increased fuel consumption.
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