AutoCodes – GMC – P0757 2015 GMC Sierra

P0757 2015 GMC Sierra Code - Shift Solenoid Valve 2 Performance Stuck On

Quick Answer

The transmission fluid pressure switch, also known as the pressure switch manifold, is a multiple switch assembly made up of 3 normally open pressure switches and 1 normally closed pressure switch. 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: P0757 2015 GMC Sierra indicates Shift Solenoid Valve 2 Performance Stuck On.
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 274

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
Cost to Diagnose
FAQs
Comments
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Code P0757 2015 GMC Sierra Description

The transmission fluid pressure switch, also known as the pressure switch manifold, is a multiple switch assembly made up of 3 normally open pressure switches and 1 normally closed pressure switch. Pressure switch 1 monitor shift valve 1 positioning, pressure switch 2 monitors shift valve 2 positionings, and pressure switch 3 monitors shift valve 3 positionings. The normally open pressure switches 1–3 communicate the positioning to the transmission control module (TCM). The position of shift valves 1–3 is controlled by 3 normally closed shift solenoid valves. When energized, the shift solenoid valves directly control the main pressure to shift valve 1, 2, or 3, which strokes the shift valve. When the valve is stroked, an exhaust passage is blocked and fluid pressure to the pressure switch increases. The Diagnostic Trouble Code (DTC) will be set if the shift solenoid 2 is commanded off and pressure switch 2 remains on for 6–10 s, depending on the transmission fluid temperature.

OBDII Code P0757 2015 GMC Sierra - Shift Solenoid Valve 2 Performance Stuck On - AutoCodes.com — P0757 2015 GMC Sierra Code - Shift Solenoid Valve 2 Performance Stuck On

What does this mean?

What are the Possible Causes of the DTC P0757 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
Faulty Transmission Control Module (TCM)

How to Fix the DTC P0757 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0757 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.

Need more information about the P0757 2015 GMC Sierra code?

Need more information on how to fix the P0757 2015 GMC Sierra code? Get Access to Factory Service Manuals

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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 P0757 2015 GMC Sierra Code

What does OBDII code P0757 mean on a 2015 GMC Sierra?

Code P0757 indicates that Shift Solenoid Valve 2 is stuck in the "on" position, which can affect the transmission's ability to shift gears properly.

What are the symptoms of code P0757 on a 2015 GMC Sierra?

Common symptoms include harsh or erratic shifting, transmission slipping, reduced fuel efficiency, and the check engine light being illuminated.

What causes code P0757 in a 2015 GMC Sierra?

Possible causes include a faulty shift solenoid, dirty or contaminated transmission fluid, a damaged transmission valve body, or internal wiring issues.

Can dirty transmission fluid trigger code P0757?

Yes, dirty or contaminated transmission fluid can cause the shift solenoid to stick, triggering the P0757 code.

How do you diagnose code P0757 on a 2015 GMC Sierra?

Diagnosis typically involves checking the transmission fluid condition, inspecting wiring and connectors, testing the shift solenoid, and scanning for related codes.

Can you drive a 2015 GMC Sierra with code P0757?

Driving with this code is not recommended, as it may cause further damage to the transmission or lead to unsafe driving conditions.

How do you fix code P0757 on a 2015 GMC Sierra?

Repairs may include replacing the shift solenoid, flushing the transmission fluid, repairing damaged wiring, or replacing the valve body if necessary.

How much does it cost to repair code P0757 on a 2015 GMC Sierra?

The cost varies but typically ranges from $150 to $500 for solenoid replacement. Additional costs may apply if other components are damaged.

Can a faulty TCM (Transmission Control Module) cause code P0757?

Yes, a malfunctioning TCM can incorrectly control the shift solenoid, leading to this code.

Should I reset the code P0757 without repairs?

Resetting the code without addressing the underlying issue is not advised, as the problem will likely recur and may cause further transmission damage.