P0977 GMC Code - Shift Solenoid 'B' Open Or Short To Power
Quick Answer
The P0977 GMC code indicates that there is a malfunction in Shift Solenoid 'B', which is responsible for controlling the flow of transmission fluid in the transmission system. Common causes include Faulty shift solenoid 'B', Wiring issues or a short circuit in the solenoid circuit, Low transmission fluid levels or contaminated fluid. 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 GMC indicates Shift Solenoid 'B' Open Or Short To Power.
- Common causes
- Common causes include Faulty shift solenoid 'B', Wiring issues or a short circuit in the solenoid circuit, Low transmission fluid levels or contaminated fluid.
- 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 P0977 GMC Description
The P0977 GMC code indicates that there is a malfunction in Shift Solenoid 'B', which is responsible for controlling the flow of transmission fluid in the transmission system. This can occur when the solenoid is either open or shorted to power, meaning that it is not functioning properly. When this happens, it can lead to issues with the transmission's ability to shift gears smoothly and efficiently, impacting the vehicle's overall performance.
Common Causes of P0977 GMC
- Faulty shift solenoid 'B'
- Wiring issues or a short circuit in the solenoid circuit
- Low transmission fluid levels or contaminated fluid
- Electrical problems in the transmission control module
- Mechanical issues within the transmission system
Symptoms of P0977 GMC
- Erratic shifting patterns
- Delayed gear engagement
- Inability to shift gears
- Poor acceleration
- Reduced fuel efficiency
How to Fix P0977 GMC
- Diagnose the issue by using a scan tool to read the trouble codes and checking the transmission fluid level and condition.
- Inspect the wiring and connections to the shift solenoid 'B' for any signs of damage or corrosion.
- Test the shift solenoid 'B' using a multimeter to determine if it is functioning properly.
- Replace the shift solenoid 'B' if it is found to be faulty, making sure to use a high-quality replacement part.
- Clear the trouble codes and test drive the vehicle to ensure that the issue has been resolved and the transmission is shifting correctly.
Cost to Fix P0977 GMC
The cost of repairing a Shift Solenoid 'B' Open Or Short To Power issue can vary depending on the specific make and model of the vehicle, as well as the location and labor rates of the auto repair shop. On average, the cost of replacing a shift solenoid 'B' can range from $150 to $400, including parts and labor. However, additional costs may be incurred if other transmission components need to be replaced or if further diagnostics are required. It is recommended to consult with a qualified mechanic to get an accurate estimate for your particular vehicle.
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Information for Specific GMC Models
- P0977 2014 GMC Sierra — Shift Solenoid 'B' Open Or Short To Power
- P0977 2015 GMC Sierra — Shift Solenoid 'B' Open Or Short To Power
- P0977 2016 GMC Sierra — Shift Solenoid 'B' Open Or Short To Power
- P0977 2017 GMC Sierra — Shift Solenoid 'B' Open Or Short To Power
- P0977 2018 GMC Sierra — Shift Solenoid 'B' Open Or Short To Power
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