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Engine-Codes – GMC – P0776 GMC

P0776 GMC Code - Clutch Pressure Control Solenoid 2 Stuck Off

Quick Answer

The P0776 diagnostic trouble code (DTC) for GMC vehicles indicates that the Clutch Pressure Control Solenoid 2 is stuck off. Common causes include Malfunctioning clutch pressure control solenoid, Electrical issues such as a faulty wiring harness or connectors, 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
P0776 GMC indicates Clutch Pressure Control Solenoid 2 Stuck Off.
Common causes
Common causes include Malfunctioning clutch pressure control solenoid, Electrical issues such as a faulty wiring harness or connectors, 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.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P0776 GMC Description

The P0776 diagnostic trouble code (DTC) for GMC vehicles indicates that the Clutch Pressure Control Solenoid 2 is stuck off. This code is related to the transmission system and specifically the solenoid responsible for controlling the clutch pressure. The clutch pressure control solenoid is a crucial component in the automatic transmission system, as it regulates the amount of hydraulic pressure applied to the clutch pack to engage or disengage the gears.

OBDII Code P0776 GMC - Clutch Pressure Control Solenoid 2 Stuck Off
P0776 GMC Code - Clutch Pressure Control Solenoid 2 Stuck Off

Common Causes of P0776 GMC

  1. Malfunctioning clutch pressure control solenoid
  2. Electrical issues such as a faulty wiring harness or connectors
  3. Low transmission fluid levels
  4. Internal transmission problems
  5. Mechanical issues within the transmission system

Symptoms of P0776 GMC

  1. Harsh or delayed shifting
  2. Erratic gear changes
  3. Transmission slippage
  4. Illuminated check engine light
  5. Reduced fuel efficiency

How to Fix P0776 GMC

  1. Perform a diagnostic scan to confirm the P0776 code and identify the specific cause of the issue.
  2. Inspect the clutch pressure control solenoid 2 and its wiring for any signs of damage or wear.
  3. Check the transmission fluid level and quality, ensuring it is at the correct level and not contaminated.
  4. If the solenoid is faulty, replace it with a new one and clear the DTC from the vehicle's computer system.
  5. Test drive the vehicle to ensure the issue has been successfully resolved and that the transmission is functioning properly.

Cost to Fix P0776 GMC

The cost of repairing a Clutch Pressure Control Solenoid 2 that is stuck off can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. On average, the parts for this repair can range from $100 to $200, while labor costs may range from $150 to $300. Overall, the total repair cost could be between $250 and $500. It's important to note that prices can vary based on factors such as location, vehicle make and model, and the severity of the issue. It's recommended to obtain quotes from multiple repair shops to ensure a competitive price for the repair.

What does this mean?

Tech Notes for P0776 GMC

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.



There is a factory service bulletin for the following GMC Models:

2007-2009 GMC Acadia

2007-2009 GMC Acadia Factory Service Bulletin OBDII Code P0776

Need more information about the P0776 GMC code?

Need more information on how to fix the P0776 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0776 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

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 P0776 GMC Code

1. What are the common symptoms of OBDII code P0776 in a GMC vehicle?

- Common symptoms include harsh shifting, slipping gears, delayed engagement, and the transmission being stuck in one gear.

2. What does the OBDII code P0776 indicate in a GMC vehicle?

- This code indicates that the Clutch Pressure Control Solenoid 2 is stuck off, affecting the operation of the transmission.

3. What are the possible causes of OBDII code P0776 in a GMC vehicle?

- Possible causes include a faulty Clutch Pressure Control Solenoid 2, wiring issues, low transmission fluid, or a malfunctioning transmission control module.

4. How can I diagnose the Clutch Pressure Control Solenoid 2 issue causing OBDII code P0776 in my GMC vehicle?

- Diagnosing the issue involves checking the wiring for any damage, testing the solenoid for proper operation, and ensuring the transmission fluid is at the correct level and in good condition.

5. What are the repair options for OBDII code P0776 in a GMC vehicle?

- Repairs may involve replacing the Clutch Pressure Control Solenoid 2, repairing any damaged wiring, addressing low transmission fluid levels, or reprogramming the transmission control module.

6. Can I drive my GMC vehicle with OBDII code P0776 present?

- It is not recommended to drive the vehicle with this code present, as it can lead to further damage to the transmission and potential safety issues on the road.

7. How much does it typically cost to repair OBDII code P0776 in a GMC vehicle?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from $200 to $600, including parts and labor.

8. Are there any preventive maintenance tips to avoid OBDII code P0776 in a GMC vehicle?

- Regularly checking and changing the transmission fluid, performing routine vehicle inspections, and addressing any transmission-related issues promptly can help prevent this code from occurring.

9. Can a DIY enthusiast fix OBDII code P0776 in a GMC vehicle?

- While some experienced DIY enthusiasts may be able to diagnose and replace the Clutch Pressure Control Solenoid 2 themselves, it is recommended to consult a professional mechanic for accurate diagnosis and repairs.

10. How long does it take to repair OBDII code P0776 in a GMC vehicle?

- The repair time can vary depending on the exact cause of the issue and the availability of parts, but it typically takes a few hours to a full day to complete the repairs.

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