P0747 2017 GMC Sierra Code - Transmission Control Solenoid Valve 1 Stuck On
Quick Answer
The P0747 code on a 2017 GMC Sierra indicates a problem with the Transmission Control Solenoid Valve 1 being stuck on. Common causes include Faulty transmission control solenoid, Electrical issues such as a short circuit, Low transmission fluid levels. 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 GMC Sierra indicates Transmission Control Solenoid Valve 1 Stuck On.
- Common causes
- Common causes include Faulty transmission control solenoid, Electrical issues such as a short circuit, Low transmission fluid levels.
- 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 P0747 2017 GMC Sierra Description
The P0747 code on a 2017 GMC Sierra indicates a problem with the Transmission Control Solenoid Valve 1 being stuck on. The transmission control solenoid is responsible for regulating the flow of transmission fluid in the transmission system. When this solenoid gets stuck in the on position, it can disrupt the proper functioning of the transmission, leading to issues such as harsh shifting, delayed shifting, or even the transmission getting stuck in a particular gear.
Common Causes of P0747 2017 GMC Sierra
- Faulty transmission control solenoid
- Electrical issues such as a short circuit
- Low transmission fluid levels
- Contaminated transmission fluid
- Mechanical failure within the transmission system
Symptoms of P0747 2017 GMC Sierra
- Harsh or delayed shifting
- Transmission slipping
- Inability to shift gears
- Reduced fuel efficiency
- Illumination of the check engine light
How to Fix P0747 2017 GMC Sierra
- Perform a diagnostic scan to confirm the P0747 code and identify the specific issue with the transmission control solenoid valve.
- Inspect the transmission control solenoid valve for any visible damage or signs of wear.
- Replace the faulty transmission control solenoid valve with a new one.
- Clear the diagnostic trouble codes and test drive the vehicle to ensure the issue has been resolved.
- Check and refill transmission fluid as needed to ensure proper levels.
Cost to Fix P0747 2017 GMC Sierra
The cost of repairing a P0747 code on a 2017 GMC Sierra can vary depending on the specific cause of the issue and the labor rates at the repair shop. On average, the cost of replacing a transmission control solenoid valve can range from $150 to $400, including parts and labor. However, additional costs may apply if there are other underlying issues that need to be addressed. As mentioned earlier, labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate.
Tech Notes for P0747 2017 GMC Sierra
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Frequently Asked Questions about P0747 2017 GMC Sierra Code
1. What does the OBDII code P0747 mean on a 2017 GMC Sierra?
P0747 indicates that the Transmission Control Solenoid Valve 1 is stuck in the "on" position, preventing proper hydraulic pressure regulation in the transmission.
2. What are the common symptoms of the P0747 code?
Symptoms include harsh or delayed shifting, transmission slipping, a noticeable decrease in fuel efficiency, and the check engine light being illuminated.
3. What causes the P0747 code to appear on a 2017 GMC Sierra?
Common causes include a faulty transmission control solenoid, contaminated transmission fluid, internal transmission damage, or wiring and connector issues in the solenoid circuit.
4. Can I drive my 2017 GMC Sierra with the P0747 code active?
Driving with this code is not recommended, as it can cause further transmission damage and lead to more expensive repairs.
5. How is the P0747 code diagnosed?
A mechanic will typically check the transmission fluid condition, inspect the wiring and connectors for damage, perform a scan tool test on the solenoid, and possibly drop the transmission pan to inspect for debris.
6. What repairs can fix the P0747 code on a GMC Sierra?
Repairs may include replacing the transmission control solenoid, flushing and replacing the transmission fluid, repairing or replacing damaged wiring, or addressing internal transmission issues.
7. How much does it cost to fix the P0747 code on a 2017 GMC Sierra?
The cost depends on the underlying issue but typically ranges from $150 to $400 for solenoid replacement or up to $2,000 for major transmission repairs.
8. Can low transmission fluid cause the P0747 code?
Low or contaminated transmission fluid can contribute to this code by affecting the solenoid's ability to operate correctly.
9. How do I prevent the P0747 code from occurring?
Regularly servicing your transmission, including fluid changes, and inspecting the transmission system for wear or damage can help prevent this issue.
10. Will clearing the P0747 code with a scan tool fix the problem?
Clearing the code will not fix the underlying issue. The cause of the fault must be diagnosed and repaired to prevent the code from returning.
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