P0979 2017 Chevrolet Silverado Code - Shift Solenoid Valve 3 Control Circuit Low Voltage
Quick Answer
The Transmission Control Module (TCM) high side driver 1 supplies 12 V to pressure control solenoid valve 3. Common causes include Faulty Shift Solenoid Valve 3, Shift Solenoid Valve 3 harness is open or shorted, Shift Solenoid Valve 3 circuit poor electrical connection. 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
- P0979 2017 Chevrolet Silverado indicates Shift Solenoid Valve 3 Control Circuit Low Voltage.
- Common causes
- Common causes include Faulty Shift Solenoid Valve 3, Shift Solenoid Valve 3 harness is open or shorted, Shift Solenoid Valve 3 circuit poor electrical connection.
- 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.
Code P0979 2017 Chevrolet Silverado Description
What are the Possible Causes of the DTC P0979 2017 Chevrolet Silverado?
- Faulty Shift Solenoid Valve 3
- Shift Solenoid Valve 3 harness is open or shorted
- Shift Solenoid Valve 3 circuit poor electrical connection
- Faulty Transmission Control Module (TCM)
How to Fix the DTC P0979 2017 Chevrolet Silverado?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0979 2017 Chevrolet Silverado code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0979 2017 Chevrolet Silverado Code
1. What does the OBDII code P0979 mean for a 2017 Chevrolet Silverado?
P0979 indicates a low voltage issue in the control circuit of shift solenoid valve 3, which affects the transmission’s ability to shift properly.
2. What are common symptoms of code P0979 in a 2017 Chevrolet Silverado?
Symptoms may include erratic shifting, being stuck in one gear, transmission slipping, or the check engine light turning on.
3. What causes the P0979 code in a Chevrolet Silverado?
Common causes include a faulty shift solenoid, damaged wiring or connectors in the solenoid circuit, low transmission fluid, or a malfunctioning transmission control module (TCM).
4. Can driving with code P0979 damage my Silverado’s transmission?
Yes, driving with this code can lead to further transmission damage due to improper shifting and fluid pressure regulation.
5. How do I diagnose code P0979 in a 2017 Chevrolet Silverado?
Diagnose by inspecting the wiring and connectors for damage, checking solenoid resistance with a multimeter, and verifying TCM functionality.
6. How do I fix the P0979 code in my Chevrolet Silverado?
Repairs may include replacing the faulty shift solenoid, repairing damaged wiring, cleaning connectors, or replacing the transmission control module.
7. How much does it cost to repair a P0979 code on a Silverado?
Costs typically range from $150 to $400 depending on whether the solenoid or wiring needs replacement, though prices vary by region and labor rates.
8. Can low transmission fluid cause the P0979 code in a Silverado?
Yes, insufficient transmission fluid can result in improper solenoid operation and trigger the P0979 code.
9. How can I prevent the P0979 code from occurring in my Silverado?
Regularly inspect and maintain transmission fluid levels, check wiring for wear, and promptly address any transmission issues.
10. Is the P0979 code specific to Chevrolet Silverados?
No, the P0979 code can appear in other vehicles with similar transmission systems, though the specifics may vary by make and model.
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