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P0777 2014 GMC Sierra Code - Clutch Pressure Control Solenoid 2 Stuck On

Quick Answer

The diagnostic trouble code P0777 for a 2014 GMC Sierra indicates an issue with the Clutch Pressure Control Solenoid 2 being stuck on. Common causes include Faulty clutch pressure control solenoid, Electrical issues such as a short or open circuit in the wiring, Low transmission fluid level or dirty fluid. 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
P0777 2014 GMC Sierra indicates Clutch Pressure Control Solenoid 2 Stuck On.
Common causes
Common causes include Faulty clutch pressure control solenoid, Electrical issues such as a short or open circuit in the wiring, Low transmission fluid level or dirty fluid.
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 06, 2024
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Code P0777 2014 GMC Sierra Description

The diagnostic trouble code P0777 for a 2014 GMC Sierra indicates an issue with the Clutch Pressure Control Solenoid 2 being stuck on. This solenoid is responsible for controlling the hydraulic pressure in the transmission's clutch pack, which is essential for smooth gear shifts. When this solenoid gets stuck in the on position, it can lead to various problems with the transmission's operation, potentially causing gear shifting issues, transmission slipping, and overall reduced performance.

OBDII Code P0777 2014 GMC Sierra - Clutch Pressure Control Solenoid 2 Stuck On
P0777 2014 GMC Sierra Code - Clutch Pressure Control Solenoid 2 Stuck On

Common Causes of P0777 2014 GMC Sierra

  1. Faulty clutch pressure control solenoid
  2. Electrical issues such as a short or open circuit in the wiring
  3. Low transmission fluid level or dirty fluid
  4. Mechanical issues within the transmission
  5. Software or programming issues in the transmission control module

Symptoms of P0777 2014 GMC Sierra

  1. Harsh or delayed shifting between gears
  2. Transmission slipping
  3. Engine stalling or hesitation
  4. Decreased fuel efficiency
  5. Illumination of the Check Engine light

How to Fix P0777 2014 GMC Sierra

  1. Begin by conducting a visual inspection of the clutch pressure control solenoid and its wiring for any signs of damage or wear.
  2. Test the solenoid using a multimeter to check for proper resistance and functionality.
  3. Check the transmission fluid level and condition, topping up or replacing as necessary.
  4. If the solenoid is found to be faulty, it will need to be replaced with a new one.
  5. Clear the trouble code from the vehicle's computer using a scan tool and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0777 2014 GMC Sierra

The typical repair cost for addressing a Clutch Pressure Control Solenoid 2 Stuck On code in 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 inquire with local shops for a more accurate estimate. Keep in mind that rates at dealerships or in metropolitan areas may be higher, while independent shops might offer lower prices.

What does this mean?

Tech Notes for P0777 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.

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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.

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