AutoCodes – GMC – P0751 2015 GMC Sierra

P0751 2015 GMC Sierra Code - Shift Solenoid Valve 1 Performance Stuck Off

Quick Answer

The shift solenoid 1 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: P0751 2015 GMC Sierra indicates Shift Solenoid Valve 1 Performance 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 246

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
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0751 2015 GMC Sierra Description

The shift solenoid 1 is part of the control solenoid valve assembly which has no serviceable parts. The control solenoid valve assembly is attached to the lower control valve body. The solenoid operates by the Transmission Control Module opening or closing the ground circuit. With the solenoid circuit grounded (solenoid on), the internal plunger and metering ball block the exhaust fluid creating signal fluid pressure. The signal fluid acts against the clutch select valve 2 to overcome the valve spring force moving it to the apply position, allowing the shift. The shift solenoid 1 is commanded ON in Park, Reverse, Neutral, and Drive 1 Engine Braking, and commanded OFF in Drive 1–6 gear ranges. The Diagnostic Trouble Code (DTC) will be set when the gear slip is greater than 400 RPM for 2 s.

OBDII Code P0751 2015 GMC Sierra - Shift Solenoid Valve 1 Performance Stuck Off - AutoCodes.com — P0751 2015 GMC Sierra Code - Shift Solenoid Valve 1 Performance Stuck Off

What does this mean?

What are the Possible Causes of the DTC P0751 2015 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 P0751 2015 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 is stuck off, 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 very dirty, it is 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 transmission mechanical 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 P0751 2015 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 P0751 2015 GMC Sierra Code

1. What are common symptoms of OBDII code P0751 in a 2015 GMC Sierra?

Common symptoms include harsh shifting, delayed or erratic shifting, transmission slipping, and the transmission being stuck in a single gear.

2. What does the OBDII code P0751 Shift Solenoid Valve 1 Performance Stuck Off indicate in a 2015 GMC Sierra?

This code indicates that the transmission control module has detected a malfunction with the shift solenoid valve 1, causing it to be stuck in the "off" position.

3. What are possible causes of the P0751 trouble code in a 2015 GMC Sierra?

Potential causes include a faulty shift solenoid valve 1, low transmission fluid level, dirty or contaminated transmission fluid, wiring issues, or a malfunctioning transmission control module.

4. How serious is the P0751 Shift Solenoid Valve 1 Performance Stuck Off code in a 2015 GMC Sierra?

This code can lead to transmission performance issues and should be addressed promptly to prevent further damage to the transmission system.

5. Can I continue driving my 2015 GMC Sierra with the P0751 trouble code?

It is not recommended to continue driving the vehicle with this code present, as it can cause further damage to the transmission and potentially leave you stranded.

6. How can I diagnose and repair the P0751 code in my 2015 GMC Sierra?

Diagnosis typically involves inspecting the shift solenoid valve 1, checking the transmission fluid level and condition, and testing the wiring and connectors. Repairs may involve replacing the shift solenoid valve, performing a transmission fluid flush, or addressing any wiring issues.

7. Will resetting the OBDII code P0751 in my 2015 GMC Sierra make it go away permanently?

Resetting the code may temporarily turn off the check engine light, but if the underlying issue causing the code is not addressed, it is likely to return.

8. How much does it cost to repair the Shift Solenoid Valve 1 Performance Stuck Off code in a 2015 GMC Sierra?

The cost of repairs can vary depending on the exact cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. Can a DIY enthusiast fix the P0751 code in a 2015 GMC Sierra?

While some may attempt DIY repairs for this code, it is recommended to have a professional mechanic diagnose and repair transmission-related issues due to the complexity of the system.

10. How can I prevent the OBDII code P0751 from occurring in my 2015 GMC Sierra in the future?

Regular maintenance, including checking and changing transmission fluid as recommended, can help prevent issues like the P0751 code. Promptly addressing any transmission problems can also help prevent the code from reoccurring.