AutoCodes – GMC – P0776 2016 GMC Sierra

P0776 2016 GMC Sierra Code - Clutch Pressure Control Solenoid 2 Stuck Off

Quick Answer

The clutch pressure control solenoid valve 2 is part of the control solenoid valve assembly, which has no serviceable parts. Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Control Solenoid Valve Assembly. 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 2016 GMC Sierra indicates Clutch Pressure Control Solenoid 2 Stuck Off.
Common causes: Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Control Solenoid Valve Assembly.
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 Popularity 208

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 25, 2024

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0776 2016 GMC Sierra Description

The clutch pressure control solenoid valve 2 is part of the control solenoid valve assembly, which has no serviceable parts. The pressure control solenoid valve 2 regulates transmission fluid pressure to the 3-5-Reverse clutch regulator valve which controls pressure to the 3-5-Reverse clutch. The Transmission Control Module calculates the gear ratio based on the RPM signals from the input speed sensor (ISS) and the output speed sensor (OSS). The Transmission Control Module compares the expected transmission gear ratio to the calculated gear ratio for each commanded gear. The Diagnostic Trouble Code (DTC) will be set when the Transmission Control Module has detected an incorrect gear ratio or neutral condition when the 3-5-R clutch is commanded ON. This condition must occur 3 times.

OBDII Code P0776 2016 GMC Sierra - Clutch Pressure Control Solenoid 2 Stuck Off - AutoCodes.com — P0776 2016 GMC Sierra Code - Clutch Pressure Control Solenoid 2 Stuck Off

What does this mean?

What are the Possible Causes of the DTC P0776 2016 GMC Sierra?

Low transmission fluid level
Dirty transmission fluid
Faulty Control Solenoid Valve Assembly
Control Solenoid Valve Assembly harness or connectors
Control Solenoid Valve Assembly circuit is open or shorted

How to Fix the DTC P0776 2016 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 does this mean?

Code Tech Notes

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0776 2016 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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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 2016 GMC Sierra Code

1. What does the OBDII code P0776 mean for a 2016 GMC Sierra?

P0776 indicates that the Clutch Pressure Control Solenoid 2 is stuck off, meaning the transmission is having trouble regulating hydraulic pressure for proper shifting.

2. What are common symptoms of code P0776 in a 2016 GMC Sierra?

Symptoms include harsh or delayed shifting, transmission slipping, reduced fuel efficiency, or the vehicle going into limp mode.

3. What causes the P0776 code to appear on a 2016 GMC Sierra?

Common causes include a faulty clutch pressure control solenoid, dirty or low transmission fluid, clogged transmission filter, or internal transmission issues.

4. Can I drive my 2016 GMC Sierra with a P0776 code?

While it may be possible to drive, it is not recommended as it can lead to further damage to the transmission or leave you stranded.

5. How can I fix the P0776 code on my 2016 GMC Sierra?

Start by checking and replacing the transmission fluid if dirty or low. If the issue persists, the clutch pressure control solenoid may need to be replaced or the transmission may require further inspection.

6. How much does it typically cost to repair a P0776 code on a 2016 GMC Sierra?

Repair costs can range from $150 to $500 if the solenoid needs replacement, but more extensive transmission repairs can exceed $1,000.

7. Can dirty transmission fluid cause a P0776 code on a 2016 GMC Sierra?

Yes, dirty or contaminated transmission fluid can restrict solenoid movement and cause the P0776 code to trigger.

8. Will resetting the check engine light fix the P0776 code on a 2016 GMC Sierra?

No, resetting the light will not fix the underlying issue. The root cause must be diagnosed and repaired to resolve the code.

9. How do I diagnose the P0776 code on my 2016 GMC Sierra?

Use an OBDII scanner to confirm the code, inspect the transmission fluid condition, check for wiring or connector issues, and test the clutch pressure control solenoid.

10. Is the P0776 code a serious issue for a 2016 GMC Sierra?

Yes, it can be serious as it impacts transmission performance and can lead to costly repairs if not addressed promptly.