C0397 2015 GMC Sierra Code - Transfer Case Clutch
Quick Answer
In 4WD/AWD Automatic range, the Transfer Case Control Module monitors the front and rear wheel speed sensors for slip. 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
- C0397 2015 GMC Sierra indicates Transfer Case Clutch.
- 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.
Code C0397 2015 GMC Sierra Description
What are the Possible Causes of the DTC C0397 2015 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 C0397 2015 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.
Code Tech Notes
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
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the C0397 2015 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.
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Frequently Asked Questions about C0397 2015 GMC Sierra Code
1. What does the OBDII code C0397 mean on a 2015 GMC Sierra?
The code C0397 indicates an issue with the transfer case clutch system, specifically the transfer case range actuator or clutch solenoid control circuit.
2. What are the symptoms of code C0397 on a 2015 GMC Sierra?
Common symptoms include the "Service 4WD" message on the dashboard, failure to shift between 4WD and 2WD modes, or unusual noises from the transfer case.
3. What causes the C0397 code on a GMC Sierra?
Potential causes include a faulty transfer case clutch solenoid, wiring issues in the solenoid circuit, a malfunctioning range actuator, or internal transfer case damage.
4. Can I still drive my 2015 GMC Sierra with a C0397 code?
While the truck may still be drivable in 2WD mode, using 4WD or attempting to shift between drive modes could cause further damage or leave the vehicle stuck in an undesired mode.
5. How do I diagnose the C0397 code on my GMC Sierra?
Diagnose the issue by using a scan tool to confirm the code, inspecting the wiring and connectors for damage, and testing the transfer case clutch solenoid and range actuator for proper function.
6. How can I fix the C0397 code on a 2015 GMC Sierra?
Repairs may include replacing the transfer case clutch solenoid, repairing damaged wiring or connectors, or replacing the transfer case range actuator if it’s defective.
7. What is the cost of repairing a C0397 code on a GMC Sierra?
The repair cost can vary depending on the issue, but replacing the transfer case clutch solenoid typically costs between $150 to $400, including parts and labor.
8. Can a low transfer case fluid level cause the C0397 code?
Yes, low or contaminated transfer case fluid can contribute to transfer case clutch issues and trigger the C0397 code.
9. How can I prevent the C0397 code from occurring again?
Regular maintenance, including checking and replacing transfer case fluid as recommended, inspecting wiring and connectors, and avoiding excessive strain on the 4WD system, can help prevent this code.
10. Do I need to reprogram the control module after fixing the C0397 code?
In most cases, reprogramming is not required. However, clearing the code with a scan tool and performing a transfer case calibration may be necessary.
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