AutoCodes – GMC – C0306 2014 GMC Sierra

C0306 2014 GMC Sierra Code - Range Actuator Control Circuit

Quick Answer

The Transfer Case Motor, also known as the transfer case range actuator, is a bi-directional, permanent magnet, DC motor. Common causes include Faulty Transfer Case Motor (Transfer Case Two/Four Wheel Drive Actuator), Transfer Case Motor harness is open or shorted, Transfer Case Motor 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: C0306 2014 GMC Sierra indicates Range Actuator Control Circuit.
Common causes: Common causes include Faulty Transfer Case Motor (Transfer Case Two/Four Wheel Drive Actuator), Transfer Case Motor harness is open or shorted, Transfer Case Motor 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 269

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 05, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0306 2014 GMC Sierra Description

The Transfer Case Motor, also known as the transfer case range actuator, is a bi-directional, permanent magnet, DC motor. When energized, through the transfer case clockwise circuit or transfer case counterclockwise circuit, the ground is provided by the opposing motor control circuit which becomes grounded through the transfer case control module ground circuit. The transfer case range actuator, through a series of gears, rotates the transfer case control actuator shaft which moves the transfer case two/four-wheel drive actuator cam and transfer case high/low shift fork in order to shift the transfer case between the following modes or ranges: 2WD, 4WD/AWD Automatic, 4WD High/Locked, 4WD Low and Neutral.

OBDII Code C0306 2014 GMC Sierra - Range Actuator Control Circuit - AutoCodes.com — C0306 2014 GMC Sierra Code - Range Actuator Control Circuit

What does this mean?

What are the Possible Causes of the DTC C0306 2014 GMC Sierra?

Faulty Transfer Case Motor (Transfer Case Two/Four Wheel Drive Actuator)
Transfer Case Motor harness is open or shorted
Transfer Case Motor circuit poor electrical connection
Faulty Transfer Case Control Module

How to Fix the DTC C0306 2014 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 C0306 2014 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 C0306 2014 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 C0306 2014 GMC Sierra Code

1. What are common symptoms of OBDII code C0306 in a 2014 GMC Sierra?

- Common symptoms include rough shifting, hesitation during acceleration, and the check engine light being illuminated.

2. What does the OBDII code C0306 indicate in a 2014 GMC Sierra?

- OBDII code C0306 indicates an issue with the Range Actuator Control Circuit in the transmission.

3. What are the possible causes of OBDII code C0306 in a 2014 GMC Sierra?

- Possible causes include a faulty range actuator, damaged wiring or connectors, low transmission fluid levels, or a malfunctioning transmission control module.

4. How can I diagnose the OBDII code C0306 in my 2014 GMC Sierra?

- Diagnosis involves using a scan tool to retrieve the code, checking the transmission fluid level, inspecting the wiring and connectors, and testing the range actuator for proper function.

5. Can I drive my 2014 GMC Sierra with OBDII code C0306?

- It is not recommended to drive the vehicle with this code present, as it can lead to further damage to the transmission if left unresolved.

6. How can I repair OBDII code C0306 in my 2014 GMC Sierra?

- Repair typically involves replacing the faulty range actuator, repairing any damaged wiring or connectors, ensuring proper transmission fluid levels, and clearing the code from the system.

7. Is it possible to reset OBDII code C0306 in a 2014 GMC Sierra without repairing the issue?

- While you can clear the code temporarily, it is not recommended to do so without addressing the underlying problem, as it will likely reappear once the issue persists.

8. How much does it cost to repair OBDII code C0306 in a 2014 GMC Sierra?

- The cost of repair 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.

9. Can a DIY enthusiast fix OBDII code C0306 in a 2014 GMC Sierra?

- Depending on the level of expertise, a DIY enthusiast may be able to diagnose and repair this code themselves, but it is recommended to consult a professional for more complex issues.

10. How can I prevent OBDII code C0306 from occurring in my 2014 GMC Sierra in the future?

- Regular maintenance of the transmission, including checking fluid levels and addressing any issues promptly, can help prevent the recurrence of this code.