AutoCodes – GMC – C0364 2018 GMC Sierra

C0364 2018 GMC Sierra Code - Front Axle System

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: C0364 2018 GMC Sierra indicates Front Axle System.
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.

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Code Popularity 1,462

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 11, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0364 2018 GMC Sierra Description

The front axle control circuit consists of an electric motor actuator that engages and disengages the front axle. The front axle engagement actuator consists of a permanent magnetic motor, a worm gear-controlled plunger, a front axle switch, and an electronic control circuit within the actuator assembly.
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.

OBDII Code C0364 2018 GMC Sierra - Front Axle System - AutoCodes.com — C0364 2018 GMC Sierra Code - Front Axle System

What does this mean?

What are the Possible Causes of the DTC C0364 2018 GMC Sierra?

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 C0364 2018 GMC Sierra?

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 C0364 2018 GMC Sierra 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.

Need more information about the C0364 2018 GMC Sierra code?

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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 C0364 2018 GMC Sierra Code

1. What does OBDII code C0364 mean on a 2018 GMC Sierra?

Code C0364 indicates a fault in the Front Axle System, specifically related to the Front Axle Disconnect Actuator Circuit.

2. What are common symptoms of code C0364 on a 2018 GMC Sierra?

Symptoms may include the "Service 4WD" message on the dashboard, inability to engage or disengage 4WD, and abnormal noises from the front axle.

3. What causes code C0364 to appear on a 2018 GMC Sierra?

Common causes include a faulty front axle actuator, damaged wiring or connectors in the actuator circuit, or a malfunctioning transfer case control module.

4. Can I continue driving my 2018 GMC Sierra with code C0364?

While you can drive the vehicle, the 4WD system may not function properly, potentially affecting off-road or slippery road performance. Prompt diagnosis is recommended.

5. How do I diagnose code C0364 on a 2018 GMC Sierra?

Start by checking the front axle actuator and its wiring for damage or corrosion. Scan the system with an OBDII scanner to confirm the fault and test the actuator's functionality.

6. How is code C0364 repaired on a 2018 GMC Sierra?

Repairs may include replacing the front axle actuator, repairing damaged wiring or connectors, or reprogramming or replacing the transfer case control module if necessary.

7. How much does it cost to fix code C0364 on a 2018 GMC Sierra?

Repair costs vary, but replacing the front axle actuator typically ranges from $200 to $500, including parts and labor. Wiring repairs or module replacements may increase costs.

8. Can a weak battery cause code C0364 on a 2018 GMC Sierra?

Yes, a weak or failing battery can cause voltage issues, leading to faults in the Front Axle System and triggering code C0364.

9. Does code C0364 mean my front axle is damaged?

Not necessarily. The code usually points to an electrical issue in the actuator circuit rather than mechanical damage to the axle itself.

10. Do I need a professional mechanic to fix code C0364 on my 2018 GMC Sierra?

While experienced DIYers may handle basic repairs like replacing the actuator, diagnosing electrical issues or reprogramming modules may require a professional mechanic.