P0747 2014 GMC Sierra 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 2014 GMC Sierra 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.
Code P0747 2014 GMC Sierra Description
What are the Possible Causes of the DTC P0747 2014 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 P0747 2014 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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0747 2014 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.
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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.
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