Engine-CodesGMC – P0973 2017 GMC Sierra

P0973 2017 GMC Sierra Code - Shift Solenoid Valve 1 Control Circuit Low Voltage

Quick Answer

The P0973 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates a problem with the Shift Solenoid Valve 1 Control Circuit registering low voltage. Common causes include Faulty shift solenoid valve, Damaged wiring or connectors in the control circuit, Malfunctioning transmission control module (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
P0973 2017 GMC Sierra indicates Shift Solenoid Valve 1 Control Circuit Low Voltage.
Common causes
Common causes include Faulty shift solenoid valve, Damaged wiring or connectors in the control circuit, Malfunctioning transmission control module (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.
Table of contents Created and updated by William Orellana on Sep 17, 2024
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Code P0973 2017 GMC Sierra Description

The P0973 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates a problem with the Shift Solenoid Valve 1 Control Circuit registering low voltage. The shift solenoid valve is a crucial component of the transmission system responsible for controlling the flow of transmission fluid to engage the appropriate gear. In this case, the low voltage detected suggests an issue with the electrical circuit that controls the solenoid valve.

OBDII Code P0973 2017 GMC Sierra - Shift Solenoid Valve 1 Control Circuit Low Voltage
P0973 2017 GMC Sierra Code - Shift Solenoid Valve 1 Control Circuit Low Voltage

Common Causes of P0973 2017 GMC Sierra

  1. Faulty shift solenoid valve
  2. Damaged wiring or connectors in the control circuit
  3. Malfunctioning transmission control module (TCM)
  4. Low transmission fluid levels
  5. Electrical issues such as a blown fuse or relay

Symptoms of P0973 2017 GMC Sierra

  1. Delayed or harsh shifting
  2. Erratic shifting patterns
  3. Transmission slipping
  4. Inability to shift gears
  5. Illumination of the Check Engine Light

How to Fix P0973 2017 GMC Sierra

  1. Begin by conducting a thorough inspection of the shift solenoid valve, wiring, and connectors for any visible damage or corrosion.
  2. Test the shift solenoid valve using a multimeter to check for proper resistance and continuity.
  3. Inspect the transmission control module (TCM) for any signs of damage or malfunction and perform a diagnostic scan to retrieve any additional fault codes.
  4. Check the transmission fluid level and condition, topping off or replacing as needed.
  5. Clear the DTC with a scan tool after completing the repairs and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0973 2017 GMC Sierra

The cost of repairing a Shift Solenoid Valve 1 Control Circuit Low Voltage issue can vary depending on the specific cause of the problem. In general, the cost of replacing a shift solenoid valve can range from $150 to $300, while addressing wiring or connector issues may cost between $100 and $200. If the problem is related to the transmission control module (TCM), the cost can be higher, potentially exceeding $500 including parts and labor.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0973 2017 GMC Sierra Code

1. What does the OBDII code P0973 mean on a 2017 GMC Sierra?

P0973 indicates a low voltage issue in the Shift Solenoid Valve 1 Control Circuit, which helps control gear shifting in the transmission.

2. What are the common symptoms of code P0973 in a 2017 GMC Sierra?

Symptoms may include rough or delayed shifting, the transmission stuck in one gear, or the Check Engine Light being illuminated.

3. What causes code P0973 in a 2017 GMC Sierra?

Common causes include a faulty shift solenoid, damaged wiring or connectors, or a problem with the transmission control module (TCM).

4. Can I drive my 2017 GMC Sierra with the P0973 code?

Driving with this code is not recommended as it may lead to further transmission damage or unsafe driving conditions.

5. How do I diagnose the P0973 code on my 2017 GMC Sierra?

Diagnosis involves checking the shift solenoid, inspecting the wiring and connectors for damage, and testing the voltage in the control circuit.

6. How do I fix the P0973 code on a 2017 GMC Sierra?

Repairs may include replacing the shift solenoid, repairing or replacing damaged wiring, or reprogramming the TCM if necessary.

7. What tools are needed to troubleshoot code P0973 in a 2017 GMC Sierra?

You’ll need a diagnostic scanner, a multimeter for voltage testing, and potentially wiring repair tools.

8. Is the P0973 code a mechanical or electrical issue?

P0973 is primarily an electrical issue related to the control circuit of Shift Solenoid 1, though it can have mechanical consequences if unresolved.

9. How much does it cost to repair the P0973 code on a 2017 GMC Sierra?

Repair costs vary but may range from $150 to $500, depending on whether the solenoid, wiring, or TCM needs repair or replacement.

10. Can a low battery cause the P0973 code on my 2017 GMC Sierra?

While unlikely, a weak or failing battery could contribute to low voltage issues in the control circuit, so it’s worth checking.

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