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P0747 2017 Chevrolet Silverado Code - Transmission Control Solenoid Valve 1 Stuck On

Quick Answer

The P0747 diagnostic trouble code (DTC) in a 2017 Chevrolet Silverado indicates that the Transmission Control Solenoid Valve 1 is stuck on. Common causes include Faulty transmission control solenoid valve, Wiring issues or shorts in the transmission control circuit, Low transmission fluid levels or dirty 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
P0747 2017 Chevrolet Silverado indicates Transmission Control Solenoid Valve 1 Stuck On.
Common causes
Common causes include Faulty transmission control solenoid valve, Wiring issues or shorts in the transmission control circuit, Low transmission fluid levels or dirty 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.
What is this?
Table of contents Created and updated by William Orellana on Aug 19, 2024
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Code P0747 2017 Chevrolet Silverado Description

The P0747 diagnostic trouble code (DTC) in a 2017 Chevrolet Silverado indicates that the Transmission Control Solenoid Valve 1 is stuck on. This solenoid valve is responsible for controlling the flow of transmission fluid within the transmission system. When it becomes stuck in the open position, it can lead to various issues with the transmission's operation. This can result in poor shifting performance, erratic behavior, and potential damage to the transmission components over time.

OBDII Code P0747 2017 Chevrolet Silverado - Transmission Control Solenoid Valve 1 Stuck On
P0747 2017 Chevrolet Silverado Code - Transmission Control Solenoid Valve 1 Stuck On

Common Causes of P0747 2017 Chevrolet Silverado

  1. Faulty transmission control solenoid valve
  2. Wiring issues or shorts in the transmission control circuit
  3. Low transmission fluid levels or dirty fluid
  4. Mechanical issues within the transmission
  5. Software or programming issues in the transmission control module

Symptoms of P0747 2017 Chevrolet Silverado

  1. Delayed or harsh shifting between gears
  2. Transmission slipping
  3. Decreased fuel efficiency
  4. Illuminated check engine light
  5. Transmission overheating

How to Fix P0747 2017 Chevrolet Silverado

  1. Begin by checking the transmission fluid level and condition. Top off or replace the fluid as needed.
  2. Inspect the wiring and connectors related to the transmission control solenoid valve for any damage or corrosion. Repair or replace as necessary.
  3. Test the solenoid valve itself for proper operation. If it is found to be faulty, replace the solenoid valve.
  4. Clear the DTC and reset the transmission control module to ensure the code does not reappear.
  5. Conduct a test drive to verify that the transmission is operating correctly and that the symptoms associated with the P0747 code have been resolved.

Cost to Fix P0747 2017 Chevrolet Silverado

The typical repair costs for addressing a P0747 code in a 2017 Chevrolet Silverado can range from $200 to $500, including parts and labor. However, the specific costs may vary based on the location, labor rates, and any additional repairs or parts needed. It is recommended to consult with local auto repair shops for a more accurate estimate.

What does this mean?

Tech Notes for P0747 2017 Chevrolet Silverado

When a transmission solenoid has malfunctioned, in most cases the problem is not the electrical part of the solenoid; the problem is foreign material obstructing the mechanical function of the solenoid or the flow of the fluid through the transmission valve body. If the transmission fluid is dirty, it's recommended to change the transmission fluid and if possible, remove the transmission pan for further diagnosis. Excessive debris or metal particles on the transmission pan could be an indication that there is a mechanical transmission failure, and that the transmission will need to be rebuilt or replaced.

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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 P0747 2017 Chevrolet Silverado Code

1. What does the OBDII code P0747 mean on a 2017 Chevrolet Silverado?

P0747 indicates that the Transmission Control Solenoid Valve 1 is stuck in the "on" position, potentially causing shifting issues.

2. What are the symptoms of code P0747 in a 2017 Chevrolet Silverado?

Common symptoms include harsh shifting, failure to shift gears, transmission slipping, decreased fuel efficiency, and possibly the illumination of the check engine light.

3. What causes the P0747 code in a 2017 Chevrolet Silverado?

Possible causes include a malfunctioning transmission control solenoid, low or dirty transmission fluid, internal transmission damage, or wiring and connector issues.

4. Can I drive my 2017 Chevrolet Silverado with a P0747 code?

Driving with this code is not recommended, as it can lead to further transmission damage or unsafe driving conditions due to poor shifting performance.

5. How do I diagnose the P0747 code in my Silverado?

Diagnosing involves scanning for codes, inspecting transmission fluid for contamination, checking wiring and connectors, and testing the solenoid for proper operation.

6. How much does it cost to repair a P0747 code on a 2017 Chevrolet Silverado?

Repair costs vary but can range from $200 to $500 for solenoid replacement, with higher costs if internal transmission repairs are needed.

7. Can low transmission fluid cause the P0747 code in a 2017 Chevrolet Silverado?

Yes, low or contaminated transmission fluid can cause the solenoid to malfunction, leading to the P0747 code.

8. How do I fix the P0747 code in my 2017 Chevy Silverado?

Fixes may include replacing the transmission control solenoid, flushing and refilling the transmission fluid, repairing wiring issues, or addressing internal transmission problems.

9. Is a transmission flush necessary to fix code P0747?

A transmission flush may be necessary if the fluid is contaminated, as dirty fluid can cause solenoid issues. However, it depends on the specific diagnosis.

10. What tools do I need to troubleshoot the P0747 code on my 2017 Silverado?

You’ll need an OBDII scanner, a multimeter, and potentially tools to access and replace the transmission solenoid. A service manual is also helpful.

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