C0387 2017 GMC Sierra Code - Unable to Complete Shift
Quick Answer
The C0387 diagnostic trouble code (DTC) in a 2017 GMC Sierra indicates that the vehicle's electronic control module (ECM) has detected a problem with the transmission's ability to complete a shift. Common causes include Low transmission fluid levels, Faulty transmission solenoid, Malfunctioning transmission control module (TCM). 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
- C0387 2017 GMC Sierra indicates Unable to Complete Shift.
- Common causes
- Common causes include Low transmission fluid levels, Faulty transmission solenoid, Malfunctioning transmission control module (TCM).
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code C0387 2017 GMC Sierra Description
The C0387 diagnostic trouble code (DTC) in a 2017 GMC Sierra indicates that the vehicle's electronic control module (ECM) has detected a problem with the transmission's ability to complete a shift. This issue can affect the vehicle's performance by causing erratic shifting, harsh shifting, or even preventing the transmission from shifting at all. It can lead to drivability issues, reduced fuel efficiency, and potential damage to the transmission system if left unaddressed.
Common Causes of C0387 2017 GMC Sierra
- Low transmission fluid levels
- Faulty transmission solenoid
- Malfunctioning transmission control module (TCM)
- Mechanical issues within the transmission
- Electrical connection issues between the TCM and transmission components
Symptoms of C0387 2017 GMC Sierra
- Check Engine Light illuminated on the dashboard
- Erratic or harsh shifting
- Transmission slipping or hesitation
- Fail-safe mode activated, limiting vehicle speed
- Transmission may not shift at all
How to Fix C0387 2017 GMC Sierra
- Begin by checking the transmission fluid level and condition. Top off or replace the fluid if necessary.
- Inspect the transmission solenoid for any signs of damage or wear. Replace if needed.
- Use a scan tool to diagnose the TCM for any error codes or malfunctions. Reset or replace the TCM as required.
- Perform a thorough inspection of the transmission components for any mechanical issues. Repair or replace damaged parts.
- Ensure all electrical connections between the TCM and transmission are secure and free of corrosion.
Cost to Fix C0387 2017 GMC Sierra
The typical repair costs for addressing the C0387 code in a 2017 GMC Sierra can vary depending on the specific cause of the issue. On average, the repair costs for this type of transmission problem can range from $200 to $1000, including parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's advisable to check local rates for a more precise estimate.
Need more information about the C0387 2017 GMC Sierra code?
Need more information on how to fix the C0387 2017 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the C0387 2017 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about C0387 2017 GMC Sierra Code
1. What are the common symptoms of OBDII code C0387 in a 2017 GMC Sierra?
The common symptoms of OBDII code C0387 "Unable to Complete Shift" in a 2017 GMC Sierra may include difficulty shifting gears, transmission slippage, and the transmission not engaging properly.
2. What could be causing the OBDII code C0387 in a 2017 GMC Sierra?
The OBDII code C0387 in a 2017 GMC Sierra is typically caused by issues with the transmission shift solenoid, a faulty transmission control module (TCM), low transmission fluid levels, or mechanical problems within the transmission.
3. How can I diagnose the OBDII code C0387 in my 2017 GMC Sierra?
To diagnose the OBDII code C0387 in a 2017 GMC Sierra, you can use an OBDII scanner to retrieve the trouble codes, inspect the transmission fluid level and condition, check for any visible damage or leaks in the transmission system, and perform a thorough inspection of the shift solenoid and TCM.
4. What are some repair tips for fixing the OBDII code C0387 in a 2017 GMC Sierra?
Repair tips for fixing the OBDII code C0387 in a 2017 GMC Sierra may include replacing the faulty shift solenoid, repairing or replacing the TCM, ensuring the transmission fluid is at the correct level and in good condition, and addressing any mechanical issues within the transmission.
5. Can I continue driving my 2017 GMC Sierra with the OBDII code C0387?
It is not recommended to continue driving your 2017 GMC Sierra with the OBDII code C0387 "Unable to Complete Shift" as it can lead to further damage to the transmission system. It is best to address the issue promptly to prevent more serious problems.
6. How much does it typically cost to repair the OBDII code C0387 in a 2017 GMC Sierra?
The cost of repairing the OBDII code C0387 in a 2017 GMC Sierra can vary depending on the exact cause of the issue and the extent of the repairs needed. It is advisable to consult a professional mechanic for an accurate diagnosis and cost estimate.
7. Are there any recalls or technical service bulletins related to the OBDII code C0387 in a 2017 GMC Sierra?
It is advisable to check with the manufacturer or a GMC dealership to see if there are any recalls or technical service bulletins related to the OBDII code C0387 in a 2017 GMC Sierra. They may have information on known issues and potential remedies.
8. What steps should I take if the OBDII code C0387 keeps coming back in my 2017 GMC Sierra after repairs?
If the OBDII code C0387 keeps coming back in your 2017 GMC Sierra after repairs, it is important to recheck the repairs that were done, ensure all components were properly installed and functioning, and consider seeking a second opinion from a qualified mechanic to address any underlying issues.
9. Can a DIY enthusiast repair the OBDII code C0387 in a 2017 GMC Sierra?
While some DIY enthusiasts may have the skills and tools to attempt repairs related to the OBDII code C0387 in a 2017 GMC Sierra, it is a complex issue that may require specialized knowledge and equipment. It is generally recommended to consult a professional mechanic for proper diagnosis and repair.
10. How can I prevent the OBDII code C0387 from occurring in my 2017 GMC Sierra in the future?
To prevent the OBDII code C0387 from occurring in your 2017 GMC Sierra in the future, it is important to perform regular maintenance on the transmission system, check and maintain proper fluid levels, address any issues promptly, and drive your vehicle responsibly to reduce wear and tear on the transmission components.
Discuss the causes and fixes for C0387 2017 GMC Sierra OBDII Code
Code C0387 2017 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.