C0387 2015 GMC Sierra Code - Unable to Complete Shift
Quick Answer
The C0387 diagnostic trouble code (DTC) in a 2015 GMC Sierra indicates that the vehicle's transmission control module (TCM) has detected an issue that is preventing it from completing a shift. Common causes include Low transmission fluid level or dirty fluid, Faulty transmission solenoid, Malfunctioning 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 2015 GMC Sierra indicates Unable to Complete Shift.
- Common causes
- Common causes include Low transmission fluid level or dirty fluid, Faulty transmission solenoid, Malfunctioning 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.
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Code C0387 2015 GMC Sierra Description
The C0387 diagnostic trouble code (DTC) in a 2015 GMC Sierra indicates that the vehicle's transmission control module (TCM) has detected an issue that is preventing it from completing a shift. This can lead to difficulties in changing gears, resulting in erratic or harsh shifting, or the transmission may fail to shift at all. This code typically points to a problem within the transmission system that needs to be addressed promptly to prevent further damage and ensure the vehicle's proper operation.
Common Causes of C0387 2015 GMC Sierra
- Low transmission fluid level or dirty fluid
- Faulty transmission solenoid
- Malfunctioning TCM
- Wiring or connector issues
- Mechanical problems within the transmission
Symptoms of C0387 2015 GMC Sierra
- Harsh or erratic shifting
- Transmission slipping
- Delayed shifting
- Stuck in a single gear
- Check Engine Light illuminated
How to Fix C0387 2015 GMC Sierra
- Check and top off transmission fluid: Start by checking the transmission fluid level and condition. If it is low or dirty, perform a transmission fluid flush and refill to the proper level.
- Test transmission solenoids: Test the transmission solenoids to ensure they are functioning correctly. Replace any faulty solenoids as needed.
- Inspect wiring and connectors: Check the wiring harness and connectors for any damage, corrosion, or loose connections. Repair or replace any damaged components.
- Scan and reset TCM: Use a diagnostic scanner to scan the TCM for fault codes and reset the system. Clear any stored codes and retest the vehicle.
- Test drive and monitor: After completing the repairs, test drive the vehicle to ensure the shifting issue has been resolved. Monitor the transmission's performance for any abnormalities.
Cost to Fix C0387 2015 GMC Sierra
The cost of repairing a C0387 code in a 2015 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 $800, including parts and labor. However, it's essential to note that the actual cost may be higher or lower based on the extent of the repairs needed and the rates charged by auto repair shops in your area. Diagnostic time and labor rates typically range from $80 to $150 per hour, with rates potentially higher at dealerships or in metropolitan areas. For a more accurate estimate, it's recommended to consult with a local auto repair shop.
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Frequently Asked Questions about C0387 2015 GMC Sierra Code
1. What are the common symptoms of OBDII code C0387 on a 2015 GMC Sierra?
- Common symptoms include difficulty shifting gears, delays in shifting, or complete failure to shift.
2. What does OBDII code C0387 indicate in a 2015 GMC Sierra?
- OBDII code C0387 typically indicates that the vehicle's transmission is unable to complete a shift.
3. What are the possible causes of OBDII code C0387 on a 2015 GMC Sierra?
- Possible causes include low transmission fluid, a faulty shift solenoid, a malfunctioning transmission control module, or mechanical issues within the transmission.
4. How can I diagnose the issue related to OBDII code C0387 on my 2015 GMC Sierra?
- A comprehensive diagnostic scan of the transmission system using an OBDII scanner can help pinpoint the exact cause of the issue.
5. Is it safe to drive my 2015 GMC Sierra with OBDII code C0387?
- It is not recommended to drive the vehicle with this code present, as it can lead to further damage to the transmission.
6. Can I reset OBDII code C0387 on my 2015 GMC Sierra by disconnecting the battery?
- Disconnecting the battery may clear the code temporarily, but it is important to address the underlying issue to prevent the code from reappearing.
7. How much does it typically cost to repair OBDII code C0387 on a 2015 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.
8. Is it possible to repair OBDII code C0387 on a 2015 GMC Sierra myself?
- Repairing this code may require advanced knowledge and tools, so it is recommended to seek assistance from a qualified mechanic or dealership.
9. Can a software update fix OBDII code C0387 on a 2015 GMC Sierra?
- In some cases, a software update from the manufacturer may address the issue, so it is worth checking with a dealership for any available updates.
10. How often does OBDII code C0387 occur in 2015 GMC Sierra vehicles?
- While not extremely common, OBDII code C0387 can occur in 2015 GMC Sierra vehicles due to various transmission-related issues.
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