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Engine-Codes – GMC – C0397 2014 GMC Sierra

C0397 2014 GMC Sierra Code - Transfer Case Clutch

Quick Answer

The C0397 diagnostic trouble code (DTC) specifically pertains to the transfer case clutch in a 2014 GMC Sierra. Common causes include Faulty transfer case clutch actuator, Damaged wiring or connectors in the transfer case system, Low transfer case fluid levels. 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
C0397 2014 GMC Sierra indicates Transfer Case Clutch.
Common causes
Common causes include Faulty transfer case clutch actuator, Damaged wiring or connectors in the transfer case system, Low transfer case fluid levels.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code C0397 2014 GMC Sierra Description

The C0397 diagnostic trouble code (DTC) specifically pertains to the transfer case clutch in a 2014 GMC Sierra. The transfer case clutch is a crucial component of the vehicle's four-wheel drive system, responsible for transferring power from the transmission to the front and rear axles. When this code is triggered, it indicates a malfunction or issue with the transfer case clutch system.

OBDII Code C0397 2014 GMC Sierra - Transfer Case Clutch
C0397 2014 GMC Sierra Code - Transfer Case Clutch

Common Causes of C0397 2014 GMC Sierra

  1. Faulty transfer case clutch actuator
  2. Damaged wiring or connectors in the transfer case system
  3. Low transfer case fluid levels
  4. Internal mechanical failures within the transfer case
  5. Wear and tear on transfer case clutch components

Symptoms of C0397 2014 GMC Sierra

  1. Difficulty engaging or disengaging four-wheel drive modes
  2. Abnormal noises or vibrations when shifting between drive modes
  3. Illumination of the four-wheel drive warning light on the dashboard
  4. Reduced traction or handling on slippery or rough terrain
  5. Grinding or clunking sounds from the transfer case area

How to Fix C0397 2014 GMC Sierra

  1. Perform a comprehensive diagnostic scan to confirm the C0397 code and identify the specific issue with the transfer case clutch system.
  2. Inspect the transfer case clutch actuator, wiring, and connectors for any signs of damage or wear.
  3. Check transfer case fluid levels and top up if necessary, ensuring the correct type of fluid is used.
  4. Test the transfer case clutch operation and repair or replace any faulty components as needed.
  5. Clear the DTC and perform a road test to confirm that the issue has been resolved and four-wheel drive functionality is restored.

Cost to Fix C0397 2014 GMC Sierra

The typical repair costs for addressing a transfer case clutch issue can vary depending on the extent of the problem and the specific repairs needed. In general, the parts required for this repair can range from $200 to $500, with labor costs adding an additional $300 to $700. Therefore, the total cost of repairing a transfer case clutch issue could amount to approximately $500 to $1200. It's important to note that these estimates are rough averages and that actual costs may differ based on location, vehicle make and model, and the specific repairs required. Additionally, labor rates at auto repair shops can vary between $80 and $150 per hour, so it's advisable to inquire about local rates for a more accurate cost estimate.

What does this mean?

Tech Notes for C0397 2014 GMC Sierra

C0397:54 Transfer Case Clutch High Temperature

C0397:58 Transfer Case Clutch Performance

C0397:4B (if equipped) Transfer Case Clutch Calibration Not Learned

C0397:F3 Transfer Case Clutch Worn Out Clutch

C0397:F4 Transfer Case Range Position Sensor Over Travel

Need more information about the C0397 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 C0397 2014 GMC Sierra Code

1. What does the OBDII code C0397 mean on a 2014 GMC Sierra?

C0397 indicates an issue with the transfer case clutch, specifically related to a circuit malfunction or performance problem in the transfer case control module.

2. What are the symptoms of OBDII code C0397 on a 2014 GMC Sierra?

Common symptoms include the Service 4WD light illuminating, inability to shift between 2WD and 4WD modes, unusual noises from the transfer case, or reduced 4WD performance.

3. What causes the C0397 code to appear on my GMC Sierra?

Potential causes include a faulty transfer case clutch, damaged wiring or connectors, a malfunctioning transfer case control module, or low or contaminated transfer case fluid.

4. Can I still drive my 2014 GMC Sierra with the C0397 code?

While the truck may still be drivable, it could have reduced 4WD functionality, which may affect performance in off-road or slippery conditions. It’s best to address the issue promptly.

5. How do I diagnose the C0397 code on a GMC Sierra?

Start by scanning for additional codes, visually inspecting the wiring and connectors for damage, checking the transfer case fluid level and quality, and testing the transfer case clutch circuit for proper operation.

6. How do I fix the C0397 code on a 2014 GMC Sierra?

Repairs may include replacing the transfer case clutch, repairing or replacing damaged wiring or connectors, flushing and refilling the transfer case fluid, or reprogramming or replacing the transfer case control module.

7. How much does it cost to repair the C0397 code on a GMC Sierra?

The cost varies depending on the issue, ranging from $100 for fluid replacement to over $1,000 for replacing the transfer case clutch or control module.

8. Is the C0397 code covered under warranty for a 2014 GMC Sierra?

It depends on your warranty terms. Powertrain warranties might cover transfer case components, but check with your dealer for specifics.

9. Can low transfer case fluid cause the C0397 code on a GMC Sierra?

Yes, low or contaminated transfer case fluid can lead to improper clutch operation and trigger the C0397 code.

10. Do I need to reprogram the transfer case control module after fixing the C0397 code?

In some cases, reprogramming the module may be necessary if it was replaced or if software updates are required to resolve the issue.

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