P2739 2018 GMC Sierra Code - Transmission Control Solenoid Valve 6 Control Circuit High Voltage
Quick Answer
The Transmission Control Solenoid Valve Solenoid Valve is an electronic pressure regulator that controls transmission line pressure based on current flow through its coil windings. 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
- P2739 2018 GMC Sierra indicates Transmission Control Solenoid Valve 6 Control Circuit High Voltage.
- 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 P2739 2018 GMC Sierra Description
What are the Possible Causes of the DTC P2739 2018 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
- Faulty Transmission Control Module (TCM)
How to Fix the DTC P2739 2018 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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P2739 2018 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.
Need more information about the P2739 2018 GMC Sierra code?
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Frequently Asked Questions about P2739 2018 GMC Sierra Code
1. What does the OBDII code P2739 mean on a 2018 GMC Sierra?
P2739 indicates a high voltage issue in the Transmission Control Solenoid Valve 6 control circuit, which may affect the transmission's ability to shift properly.
2. What are the common symptoms of a P2739 code in a GMC Sierra?
Symptoms may include harsh or delayed shifting, transmission stuck in one gear, decreased fuel efficiency, or illumination of the check engine light.
3. What causes the P2739 code to appear?
Common causes include a faulty solenoid valve, damaged wiring or connectors, a malfunctioning transmission control module (TCM), or an electrical short in the solenoid circuit.
4. Can I drive my 2018 GMC Sierra with a P2739 code?
It is not recommended to drive with this code for an extended period, as it can lead to further transmission damage and unsafe driving conditions.
5. How do I diagnose the P2739 code in a GMC Sierra?
Diagnosis may involve using a scan tool to check for related codes, inspecting the solenoid valve wiring and connectors, and testing the solenoid circuit for proper voltage and resistance.
6. How can I fix the P2739 code on my GMC Sierra?
Repairs may include replacing the faulty solenoid valve, repairing or replacing damaged wiring, or reprogramming or replacing the TCM if necessary.
7. What tools are needed to repair a P2739 code?
Tools may include an OBDII scan tool, multimeter, wiring diagram, and basic hand tools for accessing the transmission components.
8. How much does it cost to fix a P2739 code on a 2018 GMC Sierra?
Repair costs vary but can range from $150 to $500 depending on whether the issue is with wiring, the solenoid itself, or the TCM.
9. Can a low transmission fluid level cause the P2739 code?
While low fluid levels don’t directly cause this code, they can lead to overheating or mechanical issues that may indirectly affect solenoid performance.
10. Does the P2739 code require reprogramming the TCM?
In some cases, reprogramming or updating the transmission control module may be necessary if the issue is related to a software glitch.
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