C0379 2016 Chevrolet Silverado Code - Front Axle Switch Circuit
Quick Answer
The front axle control circuit consists of an electric motor actuator that engages and disengages the front axle. Common causes include Faulty Front Axle Engagement Actuator, Front Axle Engagement Actuator harness is open or shorted, Front Axle Engagement Actuator 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
- C0379 2016 Chevrolet Silverado indicates Front Axle Switch Circuit.
- Common causes
- Common causes include Faulty Front Axle Engagement Actuator, Front Axle Engagement Actuator harness is open or shorted, Front Axle Engagement Actuator 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.
Code C0379 2016 Chevrolet Silverado Description
The front axle engagement actuator contains the following circuits: A Run/Crank Ignition 1 Voltage circuit, a Four-Wheel Drive Wheel Lock Indicator circuit, a Front Axle Actuator Control circuit, and a ground circuit.
When a shift to 4WD Auto, 4WD High, or 4WD Low is requested, the Transfer Case Control Module engages the front axle by grounding the front axle actuator control circuit through a current limiting driver.
This Diagnostic Trouble Code (DTC) will be set when a short to ground, short to voltage, or open circuit is detected.
What are the Possible Causes of the DTC C0379 2016 Chevrolet Silverado?
- Faulty Front Axle Engagement Actuator
- Front Axle Engagement Actuator harness is open or shorted
- Front Axle Engagement Actuator circuit poor electrical connection
- Faulty Transfer Case Control Module
How to Fix the DTC C0379 2016 Chevrolet Silverado?
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 is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the C0379 2016 Chevrolet Silverado 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.
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Frequently Asked Questions about C0379 2016 Chevrolet Silverado Code
1. What does the OBDII code C0379 mean on a 2016 Chevrolet Silverado?
C0379 indicates a problem with the front axle switch circuit, which is part of the four-wheel-drive system that controls the engagement of the front axle.
2. What are the common symptoms of code C0379 in a 2016 Silverado?
Symptoms may include the Service 4WD light turning on, failure to engage or disengage four-wheel drive, or unusual noises from the front axle.
3. What causes the C0379 code to appear?
Common causes include a faulty front axle switch, damaged wiring or connectors in the switch circuit, or an issue with the transfer case control module (TCCM).
4. How do I diagnose the C0379 code on a Chevrolet Silverado?
Start by inspecting the front axle switch and its wiring for damage or loose connections. Use a scan tool to monitor the TCCM and perform circuit continuity tests.
5. Can I continue driving my Silverado with the C0379 code?
While the truck may still be drivable, the four-wheel-drive system may not function correctly, which could be problematic in off-road or slippery conditions.
6. How can I fix the C0379 code on my Silverado?
Repairs may include replacing the front axle switch, repairing or replacing damaged wiring, or reprogramming or replacing the TCCM if necessary.
7. How much does it cost to repair the C0379 code?
Repair costs can vary but typically range from $100 to $300 for parts and labor, depending on whether the switch or wiring needs replacement.
8. Is the C0379 code specific to the 2016 Chevrolet Silverado?
No, this code can appear in other GM vehicles with a similar four-wheel-drive system, but the diagnosis and repair steps are specific to the vehicle model.
9. Can a dead battery cause the C0379 code to appear?
A low or dead battery can sometimes cause communication issues with the TCCM, potentially triggering this code. Ensure the battery is fully charged before further diagnosis.
10. Does the C0379 code always require part replacement?
Not always. The issue might be due to a loose or corroded connection in the circuit, which can often be resolved with cleaning or securing the connectors.
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