AutoCodesGMC – P0973 2017 GMC Sierra

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

Quick Answer

The shift solenoid 1 is part of the control solenoid valve assembly which has no serviceable parts. Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Transmission Control 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
P0973 2017 GMC Sierra indicates Shift Solenoid Valve 1 Control Circuit Low Voltage.
Common causes
Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Transmission Control 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 Popularity 194
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Mar 25, 2024
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Code P0973 2017 GMC Sierra Description

The shift solenoid 1 is part of the control solenoid valve assembly which has no serviceable parts. The shift solenoid 1 is a normally closed ON/OFF solenoid and is controlled by the Transmission Control Module through a low side driver. When the shift solenoid 1 is energized, shift solenoid 1 fluid pressure is directed to the clutch select valve 2. Power to the shift solenoid 1 is supplied by the Transmission Control Module through a high-side driver. The high-side driver protects the circuit and components from excessive current flow. If excessive current flow is detected, the high side driver will turn OFF. When the fault is corrected, the high-side driver will reset. The Diagnostic Trouble Code (DTC) will be set when the control solenoid valve assembly detects an internal low voltage electrical malfunction of the shift solenoid 1 control circuit when the shift solenoid 1 is commanded OFF for 2 seconds.
OBDII Code P0973 2017 GMC Sierra - Shift Solenoid Valve 1 Control Circuit Low Voltage - AutoCodes.com
P0973 2017 GMC Sierra Code - Shift Solenoid Valve 1 Control Circuit Low Voltage

What are the Possible Causes of the DTC P0973 2017 GMC Sierra?

  • Low transmission fluid level
  • Dirty transmission fluid
  • Faulty Transmission Control Solenoid Valve
  • Transmission Control Solenoid Valve harness is open or shorted
  • Transmission Control Solenoid Valve circuit poor electrical connection

How to Fix the DTC P0973 2017 GMC Sierra?

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 P0973 2017 GMC Sierra 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.

Need more information about the P0973 2017 GMC Sierra code?

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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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