P0974 2015 GMC Sierra Code - Shift Solenoid Valve 1 Control Circuit High Voltage
Quick Answer
The P0974 diagnostic trouble code (DTC) for a 2015 GMC Sierra relates to the Shift Solenoid Valve 1 Control Circuit registering a high voltage. Common causes include Corroded or damaged wiring in the shift solenoid valve control circuit, Loose or poor connections in the circuit, Faulty shift solenoid valve. 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
- P0974 2015 GMC Sierra indicates Shift Solenoid Valve 1 Control Circuit High Voltage.
- Common causes
- Common causes include Corroded or damaged wiring in the shift solenoid valve control circuit, Loose or poor connections in the circuit, Faulty shift solenoid valve.
- 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 P0974 2015 GMC Sierra Description
The P0974 diagnostic trouble code (DTC) for a 2015 GMC Sierra relates to the Shift Solenoid Valve 1 Control Circuit registering a high voltage. This code indicates that there is an electrical issue in the circuit that controls the operation of the shift solenoid valve 1. The shift solenoid valve is responsible for regulating the flow of transmission fluid to change gears, so a high voltage in the control circuit can lead to improper shifting or even no shifting at all.
Common Causes of P0974 2015 GMC Sierra
- Corroded or damaged wiring in the shift solenoid valve control circuit
- Loose or poor connections in the circuit
- Faulty shift solenoid valve
- Issues with the transmission control module
- Electrical issues within the transmission system
Symptoms of P0974 2015 GMC Sierra
- Harsh or delayed shifting
- Slipping out of gear
- Difficulty shifting gears
- Reduced fuel efficiency
- Poor acceleration
How to Fix P0974 2015 GMC Sierra
- Begin by performing a thorough inspection of the wiring, connectors, and shift solenoid valve for any visible damage or corrosion.
- Test the shift solenoid valve and its control circuit using a digital multimeter to check for proper voltage and continuity.
- If necessary, replace the shift solenoid valve and repair any damaged wiring or connectors.
- Clear the DTC from the vehicle's computer using a diagnostic scan tool and test drive the vehicle to ensure proper shifting functionality.
- If the issue persists, further diagnostic tests may be required to pinpoint the exact cause of the high voltage in the shift solenoid valve control circuit.
Cost to Fix P0974 2015 GMC Sierra
The typical repair costs for addressing a P0974 code in a 2015 GMC Sierra can vary depending on the extent of the issue and the specific components that need to be replaced. On average, the cost of replacing a shift solenoid valve and repairing any wiring or connectors can range from $200 to $500, including parts and labor. However, it's important to note that labor rates at auto repair shops can vary, and additional diagnostic time may be needed to accurately diagnose and resolve the issue. It's recommended to consult with a professional mechanic or service center for a more precise estimate based on your location and vehicle's specific needs.
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