AutoCodes – GMC – P0751 2016 GMC Sierra

P0751 2016 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 2016 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 2016 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 2016 GMC Sierra - Shift Solenoid Valve 1 Performance Stuck Off - AutoCodes.com — P0751 2016 GMC Sierra Code - Shift Solenoid Valve 1 Performance Stuck Off

What does this mean?

What are the Possible Causes of the DTC P0751 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 P0751 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 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 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.

Need more information about the P0751 2016 GMC Sierra 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 2016 GMC Sierra Code

1. What does OBDII code P0751 on a 2016 GMC Sierra mean?

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

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

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

3. What are the possible causes of the P0751 code in a 2016 GMC Sierra?

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

4. How can I diagnose the cause of the P0751 code in my GMC Sierra?

Diagnosis typically involves checking the transmission fluid level and condition, inspecting the wiring and connectors related to the shift solenoid, and performing a thorough scan of the transmission control module for any fault codes.

5. Can I continue to drive my GMC Sierra with the P0751 code present?

It is not recommended to drive the vehicle with the P0751 code present, as it can lead to further damage to the transmission and potentially result in a complete transmission failure.

6. How can I repair the Shift Solenoid Valve 1 performance issue in my 2016 GMC Sierra?

Repair options include replacing the faulty shift solenoid, performing a transmission fluid flush and filter change, checking and repairing any damaged wiring, or recalibrating the transmission control module.

7. Is it possible to reset the P0751 code without making any repairs?

While clearing the code may temporarily turn off the check engine light, the underlying issue causing the P0751 code will persist and likely trigger the code again in the future.

8. How much does it typically cost to repair a P0751 code in a 2016 GMC Sierra?

The cost of repair can vary depending on the exact cause of the issue, but it may range from $200 to $600 for parts and labor, excluding any additional diagnostic fees.

9. Can I prevent the recurrence of the P0751 code in my GMC Sierra?

Regular maintenance, such as keeping up with transmission fluid changes and inspections, can help prevent issues leading to the P0751 code. Additionally, addressing any warning signs promptly can help avoid more severe problems.

10. Should I attempt to repair the P0751 code in my GMC Sierra myself?

Repairing transmission-related issues can be complex and require specialized tools and knowledge. It is recommended to consult a qualified mechanic or transmission specialist to properly diagnose and repair the P0751 code in your GMC Sierra.