AutoCodes – GMC – P0751 2017 GMC Sierra

P0751 2017 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 2017 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 363

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 2017 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 2017 GMC Sierra - Shift Solenoid Valve 1 Performance Stuck Off - AutoCodes.com — P0751 2017 GMC Sierra Code - Shift Solenoid Valve 1 Performance Stuck Off

What does this mean?

What are the Possible Causes of the DTC P0751 2017 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 2017 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 2017 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.

Need more information about the P0751 2017 GMC Sierra code?

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Need Help with the Code?

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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 2017 GMC Sierra Code

1. What does OBDII code P0751 for a 2017 GMC Sierra indicate?

Code P0751 indicates a performance issue with Shift Solenoid Valve 1 in the transmission, specifically that it is stuck off.

2. What are the common symptoms of a Shift Solenoid Valve 1 malfunction?

Common symptoms include harsh or delayed shifting, transmission slipping, decreased fuel efficiency, and the transmission getting stuck in one gear.

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

Possible causes include a faulty shift solenoid, low transmission fluid, a clogged transmission filter, electrical issues, or internal transmission problems.

4. How can I diagnose the Shift Solenoid Valve 1 issue in my 2017 GMC Sierra?

Diagnosis typically involves using a scan tool to retrieve the trouble code, checking the transmission fluid level and condition, and performing a visual inspection of the shift solenoid and its wiring.

5. Can I continue driving my GMC Sierra with OBDII code P0751?

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

6. How can I repair OBDII code P0751 in my GMC Sierra?

Repair options may include replacing the faulty shift solenoid, performing a transmission fluid flush and filter change, addressing any electrical issues, or seeking professional assistance from a mechanic.

7. Is it possible to clear the P0751 code on my own?

You can attempt to clear the code using an OBDII scanner, but it is important to address the underlying issue causing the code to prevent it from reoccurring.

8. Does OBDII code P0751 affect the overall drivability of my 2017 GMC Sierra?

Yes, this code can affect the drivability of the vehicle by causing transmission shifting problems and potential performance issues.

9. How much does it typically cost to repair OBDII code P0751 in a GMC Sierra?

The cost of repair can vary depending on the specific issue causing the code, but it may range from a few hundred dollars for a simple fix to over a thousand dollars for more complex repairs.

10. Can regular maintenance help prevent OBDII code P0751 from occurring in my GMC Sierra?

Regular maintenance such as changing the transmission fluid at recommended intervals, checking for leaks, and addressing any transmission issues promptly can help prevent code P0751 and other related problems.