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Engine-Codes – GMC – P0751 2015 GMC Sierra

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

Quick Answer

The P0751 code for a 2015 GMC Sierra indicates a problem with the Shift Solenoid Valve 1 Performance being stuck off. Common causes include Faulty Shift Solenoid Valve 1, Damaged or corroded wiring/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
P0751 2015 GMC Sierra indicates Shift Solenoid Valve 1 Performance Stuck Off.
Common causes
Common causes include Faulty Shift Solenoid Valve 1, Damaged or corroded wiring/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 14, 2024
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Code P0751 2015 GMC Sierra Description

The P0751 code for a 2015 GMC Sierra indicates a problem with the Shift Solenoid Valve 1 Performance being stuck off. This solenoid is responsible for controlling the flow of transmission fluid to engage the appropriate gear for smooth shifting. When this solenoid is stuck off, it can lead to issues with gear shifting, causing the vehicle to have trouble accelerating, shifting gears, or maintaining speed. This can result in poor fuel efficiency, rough shifting, and potential damage to the transmission system if not addressed promptly.

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

Common Causes of P0751 2015 GMC Sierra

  1. Faulty Shift Solenoid Valve 1
  2. Damaged or corroded wiring/connectors
  3. Low transmission fluid levels
  4. Contaminated or degraded transmission fluid
  5. Malfunctioning Transmission Control Module (TCM)

Symptoms of P0751 2015 GMC Sierra

  1. Delayed or harsh shifting between gears
  2. Slipping gears or difficulty staying in gear
  3. Engine revving without corresponding acceleration
  4. Illumination of the Check Engine Light
  5. Decreased fuel efficiency

How to Fix P0751 2015 GMC Sierra

  1. Begin by diagnosing the specific cause of the issue using a scan tool to pinpoint the exact problem.
  2. Inspect the Shift Solenoid Valve 1 and its wiring for any damage or corrosion. Replace the solenoid if necessary.
  3. Check and top up transmission fluid levels if low. Perform a transmission fluid flush if the fluid is contaminated.
  4. Test the Transmission Control Module for any faults and replace if needed.
  5. Clear the diagnostic trouble codes and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0751 2015 GMC Sierra

The cost of repairing a P0751 code on a 2015 GMC Sierra can vary depending on the specific cause of the issue. On average, the cost of replacing a Shift Solenoid Valve 1 can range from $150 to $300, including parts and labor. If additional repairs or fluid flushes are required, the total cost could increase. It's recommended to consult with a professional mechanic for an accurate estimate based on your vehicle's specific needs and location. Labor rates typically range from $80 to $150 per hour, but can vary based on the repair shop's location and expertise.

What does this mean?

Tech Notes for P0751 2015 GMC Sierra

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.

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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.

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