P0977 2018 GMC Sierra Code - Shift Solenoid 'B' Open Or Short To Power
Quick Answer
The P0977 code in a 2018 GMC Sierra indicates a problem with the Shift Solenoid 'B' circuit, specifically an open or short to power. Common causes include Damaged wiring or connectors in the Shift Solenoid 'B' circuit, Faulty Shift Solenoid 'B', Issues with the transmission control module. 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
- P0977 2018 GMC Sierra indicates Shift Solenoid 'B' Open Or Short To Power.
- Common causes
- Common causes include Damaged wiring or connectors in the Shift Solenoid 'B' circuit, Faulty Shift Solenoid 'B', Issues with the transmission control module.
- 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 P0977 2018 GMC Sierra Description
The P0977 code in a 2018 GMC Sierra indicates a problem with the Shift Solenoid 'B' circuit, specifically an open or short to power. The shift solenoid is a crucial component of the transmission system that controls the flow of transmission fluid to engage the appropriate gear for smooth shifting. When this solenoid malfunctions, it can lead to issues with gear shifting, transmission performance, and overall drivability of the vehicle.
Common Causes of P0977 2018 GMC Sierra
- Damaged wiring or connectors in the Shift Solenoid 'B' circuit
- Faulty Shift Solenoid 'B'
- Issues with the transmission control module
- Low transmission fluid levels or contaminated fluid
- Electrical issues such as a blown fuse or relay
Symptoms of P0977 2018 GMC Sierra
- Erratic shifting or difficulty shifting gears
- Transmission slipping or delayed engagement
- Illuminated Check Engine Light
- Reduced fuel efficiency
- Harsh or rough shifting
How to Fix P0977 2018 GMC Sierra
- Diagnose the issue by using a scan tool to retrieve the trouble code and inspect the Shift Solenoid 'B' circuit for any visible damage.
- Check the wiring and connectors for any signs of wear, corrosion, or damage. Repair or replace as necessary.
- Test the Shift Solenoid 'B' for proper operation and replace if found to be faulty.
- Inspect the transmission control module for any faults or errors and address as needed.
- Clear the trouble code from the vehicle's computer and test drive to ensure proper shifting functionality.
Cost to Fix P0977 2018 GMC Sierra
The cost of repairing a Shift Solenoid 'B' open or short to power issue in a 2018 GMC Sierra can vary depending on the extent of the damage and the specific parts that need to be replaced. On average, the parts for this repair can range from $100 to $300, while the labor costs can be between $150 and $300. This brings the total estimated cost to around $250 to $600. It's important to note that these are rough estimates, and actual costs may vary based on factors such as location, labor rates, and any additional repairs that may be needed. It's recommended to consult with a qualified mechanic or auto repair shop for a more accurate cost assessment.
Need more information about the P0977 2018 GMC Sierra code?
Need more information on how to fix the P0977 2018 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0977 2018 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0977 2018 GMC Sierra Code
No Frequently Asked Questions about P0977 2018 GMC Sierra Code found.
Discuss the causes and fixes for P0977 2018 GMC Sierra OBDII Code
Code P0977 2018 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.