AutoCodes – GMC – P2728 2016 GMC Sierra

P2728 2016 GMC Sierra Code - Pressure Control Solenoid Valve Performance

Quick Answer

The pressure control solenoid 5 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: P2728 2016 GMC Sierra indicates Pressure Control Solenoid Valve Performance.
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 500

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 P2728 2016 GMC Sierra Description

The pressure control solenoid 5 is part of the control solenoid valve assembly which has no serviceable parts. The normally low-pressure control solenoid 5 regulates and directs oil pressure to the 1-2-3-4 clutch regulator valve and 1-2-3-4 clutch boost valve. Increasing pressure control solenoid 5 pressure increases pressure to the 1-2-3-4 clutch. The Transmission Control Module varies the current to the pressure control solenoid 5 through a low-side driver. Increasing the current to pressure control solenoid 5 increases oil pressure by closing OFF the solenoid exhaust port. Decreasing the current to pressure control solenoid 5 decreases oil pressure by opening the exhaust port. Pressure control solenoid 5 power is supplied by the Transmission Control Module through a high side driver. The high-side driver protects the circuit and components from excessive current flow. If excessive current flow is detected, the high side driver will turn OFF. When the fault is corrected, the high-side driver will reset.
The Diagnostic Trouble Code (DTC) will be set when the Transmission Control Module detects an internal electrical performance malfunction of the clutch pressure control solenoid valve 5 control circuit where the measured clutch pressure control solenoid valve 5 current does not equal the commanded clutch pressure control solenoid valve 5 current for 5 s.

OBDII Code P2728 2016 GMC Sierra - Pressure Control Solenoid Valve Performance - AutoCodes.com — P2728 2016 GMC Sierra Code - Pressure Control Solenoid Valve Performance

What does this mean?

What are the Possible Causes of the DTC P2728 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 P2728 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2728 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 P2728 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 P2728 2016 GMC Sierra Code

1. What does the OBDII code P2728 mean on a 2016 GMC Sierra?

P2728 indicates an issue with the pressure control solenoid "E" in the transmission, specifically a performance problem or stuck operation.

2. What are the symptoms of code P2728 on a 2016 GMC Sierra?

Common symptoms include harsh or delayed shifting, transmission slipping, poor fuel economy, and the illumination of the check engine light.

3. What causes the P2728 code to appear on a 2016 GMC Sierra?

Potential causes include a faulty pressure control solenoid, low or dirty transmission fluid, internal transmission damage, or electrical issues like damaged wiring or a failed transmission control module (TCM).

4. Can I drive my 2016 GMC Sierra with a P2728 code?

Driving with this code is not recommended as it can lead to further transmission damage and unsafe driving conditions due to erratic shifting.

5. How do I diagnose the P2728 code on my 2016 GMC Sierra?

Diagnosis typically involves scanning for additional codes, checking transmission fluid condition, inspecting wiring and connectors to the solenoid, and testing the solenoid's electrical resistance.

6. How can I fix the P2728 code on a 2016 GMC Sierra?

Repairs may include replacing the faulty pressure control solenoid, cleaning or replacing the transmission fluid, repairing damaged wiring, or addressing internal transmission issues.

7. How much does it cost to repair a P2728 code on a 2016 GMC Sierra?

Repair costs vary but typically range from $200 to $500 for solenoid replacement. Major transmission repairs could be more expensive if internal damage is found.

8. Can a low transmission fluid level cause the P2728 code?

Yes, low or dirty transmission fluid can reduce hydraulic pressure, leading to solenoid performance issues and triggering the P2728 code.

9. Is the P2728 code specific to the GMC Sierra?

No, the P2728 code can appear on other vehicles with similar transmission systems, but the exact symptoms and fixes may vary.

10. Should I update the transmission control module (TCM) software to fix the P2728 code?

In some cases, a TCM software update from the dealership may resolve transmission performance issues, but this depends on the specific situation and diagnosis.