AutoCodes – GMC – C0306 2016 GMC Sierra

C0306 2016 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 2016 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 310

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 2016 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 2016 GMC Sierra - Range Actuator Control Circuit - AutoCodes.com — C0306 2016 GMC Sierra Code - Range Actuator Control Circuit

What does this mean?

What are the Possible Causes of the DTC C0306 2016 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 2016 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 2016 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 2016 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 2016 GMC Sierra Code

1. What does OBDII code C0306 for a 2016 GMC Sierra mean?

The code C0306 indicates a problem with the Range Actuator Control Circuit in the vehicle.

2. What are the common symptoms of OBDII code C0306 in a 2016 GMC Sierra?

Common symptoms include issues with shifting gears, rough shifting, and illuminated warning lights on the dashboard.

3. What are the possible causes of OBDII code C0306 in a 2016 GMC Sierra?

Potential causes may 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 Range Actuator Control Circuit issue causing OBDII code C0306 in my 2016 GMC Sierra?

Diagnosis typically involves using a scan tool to retrieve the trouble code, inspecting the wiring and connectors for damage, checking transmission fluid levels, and performing a thorough inspection of the range actuator.

5. Can I continue to drive my 2016 GMC Sierra with OBDII code C0306 present?

It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the transmission system. It is advisable to address the issue promptly.

6. How should I repair the Range Actuator Control Circuit problem causing OBDII code C0306 in my 2016 GMC Sierra?

Repair options may include replacing the faulty range actuator, repairing or replacing damaged wiring or connectors, ensuring proper transmission fluid levels, and resetting the trouble code.

7. Are there any preventive maintenance measures to avoid OBDII code C0306 in a 2016 GMC Sierra?

Regularly checking and maintaining transmission fluid levels, addressing any transmission issues promptly, and ensuring proper care and maintenance of the transmission system can help prevent code C0306.

8. Can a DIY enthusiast fix the Range Actuator Control Circuit issue causing OBDII code C0306 in a 2016 GMC Sierra?

While some basic diagnostic steps can be performed by a DIY enthusiast, repairing the range actuator or dealing with complex transmission issues may require professional expertise.

9. How much does it typically cost to repair OBDII code C0306 in a 2016 GMC Sierra?

The cost of repairs can vary depending on the exact cause of the issue, parts needed for replacement, labor costs, and whether the repairs are done at a dealership or an independent mechanic.

10. Is it necessary to clear the OBDII code C0306 after repairing the Range Actuator Control Circuit issue in my 2016 GMC Sierra?

Yes, it is important to clear the trouble code after resolving the underlying problem to reset the vehicle's system and ensure that the issue has been properly addressed.