Engine-Codes.com
Engine-Codes – GMC – P0747 2014 GMC Sierra

P0747 2014 GMC Sierra Code - Transmission Control Solenoid Valve 1 Stuck On

Quick Answer

The P0747 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates an issue with Transmission Control Solenoid Valve 1 being stuck on. Common causes include Faulty transmission control solenoid, Wiring issues in the transmission control circuit, Malfunctioning transmission control module. 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 2014 GMC Sierra indicates Transmission Control Solenoid Valve 1 Stuck On.
Common causes
Common causes include Faulty transmission control solenoid, Wiring issues in the transmission control circuit, Malfunctioning transmission control module.
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 Sep 10, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P0747 2014 GMC Sierra Description

The P0747 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates an issue with Transmission Control Solenoid Valve 1 being stuck on. The transmission control solenoid is a crucial component of the vehicle's transmission system, responsible for controlling the flow of transmission fluid to various components. When this solenoid gets stuck in the "on" position, it can lead to a variety of issues that affect the vehicle's performance and drivability.

OBDII Code P0747 2014 GMC Sierra - Transmission Control Solenoid Valve 1 Stuck On
P0747 2014 GMC Sierra Code - Transmission Control Solenoid Valve 1 Stuck On

Common Causes of P0747 2014 GMC Sierra

  1. Faulty transmission control solenoid
  2. Wiring issues in the transmission control circuit
  3. Malfunctioning transmission control module
  4. Low transmission fluid levels
  5. Contaminated transmission fluid

Symptoms of P0747 2014 GMC Sierra

  1. Erratic or harsh shifting
  2. Delayed shifting
  3. Slipping gears
  4. Poor acceleration
  5. Decreased fuel efficiency

How to Fix P0747 2014 GMC Sierra

  1. Diagnose the issue using a scan tool to confirm the P0747 code and identify the specific cause of the problem.
  2. Inspect the transmission control solenoid valve 1 for any signs of damage or malfunction.
  3. Check the wiring and connections in the transmission control circuit for any faults or breaks.
  4. Replace the faulty transmission control solenoid valve 1 if needed, ensuring proper installation and calibration.
  5. Test drive the vehicle to ensure that the issue has been resolved and that the transmission is functioning correctly.

Cost to Fix P0747 2014 GMC Sierra

The typical repair costs for addressing a P0747 code on a 2014 GMC Sierra can range from $200 to $500, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's recommended to check local rates for a more accurate estimate before proceeding with the repair.

What does this mean?

Tech Notes for P0747 2014 GMC Sierra

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.

Need more information about the P0747 2014 GMC Sierra code?

Need more information on how to fix the P0747 2014 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0747 2014 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 2014 GMC Sierra Code

1. What does the OBDII code P0747 mean on a 2014 GMC Sierra?

P0747 indicates that the Transmission Control Solenoid Valve 1 is stuck in the "on" position, which can affect proper transmission operation.

2. What are the common symptoms of code P0747 in a 2014 GMC Sierra?

Common symptoms include harsh shifting, failure to shift gears, slipping transmission, reduced fuel efficiency, and potential limp mode activation.

3. What causes the P0747 code in a 2014 GMC Sierra?

Possible causes include a faulty transmission control solenoid, dirty or low transmission fluid, internal transmission blockages, or electrical issues such as a damaged wiring harness.

4. Can driving with a P0747 code damage my 2014 GMC Sierra?

Yes, driving with this code can cause further damage to the transmission if the issue is not addressed promptly.

5. How do you diagnose the P0747 code in a 2014 GMC Sierra?

Diagnosis involves scanning the vehicle with an OBDII tool, checking transmission fluid levels and condition, inspecting wiring and connectors, and testing the solenoid for proper operation.

6. How do you fix the P0747 code on a 2014 GMC Sierra?

Fixes may include replacing the faulty transmission control solenoid, cleaning or flushing the transmission, repairing damaged wiring, or addressing internal transmission issues.

7. Can low transmission fluid cause the P0747 code on my 2014 GMC Sierra?

Yes, low or dirty transmission fluid can cause the solenoid to stick, leading to the P0747 code.

8. How much does it cost to repair the P0747 code on a 2014 GMC Sierra?

Repair costs vary but may range from $150 to $500 for solenoid replacement, depending on labor rates and parts pricing. More extensive transmission repairs can cost significantly more.

9. Is it safe to clear the P0747 code without fixing the issue on a 2014 GMC Sierra?

Clearing the code without addressing the root cause is not recommended, as the problem will likely persist and may cause further damage over time.

10. Can a clogged transmission filter trigger the P0747 code on a 2014 GMC Sierra?

Yes, a clogged transmission filter can restrict fluid flow, potentially causing the solenoid to malfunction and trigger the P0747 code.

Discuss the causes and fixes for P0747 2014 GMC Sierra OBDII Code

Submit a New Comment

Code P0747 2014 GMC Sierra comments

No comments found for this page.