AutoCodes – Chevrolet – P0747 2017 Chevrolet Silverado

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

Quick Answer

The solenoid actuator controls fluid pressure by moving the clutch 1-2-3-4-5-6 regulator valve that controls the fluid pressure to the 1-2-3-4-5-6 clutch. 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: P0747 2017 Chevrolet Silverado indicates Transmission Control Solenoid Valve 1 Stuck On.
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 977

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 30, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0747 2017 Chevrolet Silverado Description

The solenoid actuator controls fluid pressure by moving the clutch 1-2-3-4-5-6 regulator valve that controls the fluid pressure to the 1-2-3-4-5-6 clutch. The Solenoid Valve is an electronic pressure actuator that controls transmission line pressure based on current flow through its coil windings. As current flow is increased, the magnetic field produced by the coil moves the solenoid’s plunger further away from the exhaust port. Opening the exhaust port decreases the output fluid pressure regulated by the solenoid valve, which ultimately decreases line pressure.

OBDII Code P0747 2017 Chevrolet Silverado - Transmission Control Solenoid Valve 1 Stuck On - AutoCodes.com — P0747 2017 Chevrolet Silverado Code - Transmission Control Solenoid Valve 1 Stuck On

What does this mean?

What are the Possible Causes of the DTC P0747 2017 Chevrolet Silverado?

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 P0747 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 does this mean?

Code Tech Notes

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0747 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.

Need more information about the P0747 2017 Chevrolet Silverado code?

Need more information on how to fix the P0747 2017 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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?

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