APDTY 028326 is a brand-new Variable Valve Timing (VVT) solenoid designed for the intake side of GM 2.0L, 2.2L, and 2.4L engines. When your GM vehicle throws a check engine light with codes P0010 or P0011, experiences rough idle, poor acceleration, or reduced fuel economy, a failing intake VVT solenoid is often the culprit. This direct-replacement part restores proper valve timing control, eliminating performance issues and turning off that stubborn check engine light.
Key Takeaways
- APDTY 028326 replaces the intake-side VVT solenoid on GM 2.0L, 2.2L, and 2.4L engines
- Fixes check engine codes P0010, P0011, P0020, and P0021 related to VVT system faults
- Restores proper valve timing for improved idle quality, fuel economy, and acceleration
- Direct replacement for GM OE parts 12655420, 12628347, and 12646783
- Check the live compatibility chart on APDTY.com for exact vehicle fitment
Buy APDTY 028326 directly from APDTY
What Does the VVT Solenoid Do?
The Variable Valve Timing (VVT) solenoid is an electrically controlled valve that regulates engine oil flow to the camshaft phaser. By precisely controlling oil pressure, the VVT solenoid allows the engine computer (PCM) to advance or retard camshaft timing in real time, optimizing performance across different engine speeds and loads.
APDTY 028326 controls the intake camshaft on GM's 2.0L, 2.2L, and 2.4L Ecotec engines. When functioning correctly, it helps deliver:
- Improved fuel economy by optimizing combustion timing
- Increased low-end torque and responsive acceleration
- Reduced emissions through more complete combustion
- Smoother idle and quieter engine operation
The solenoid receives pulse-width modulated signals from the PCM and responds by opening or closing internal passages that direct pressurized engine oil to the cam phaser. A failed or sticking solenoid cannot regulate oil flow properly, causing the camshaft timing to fall out of specification.
What Are the Symptoms of a Bad Intake VVT Solenoid?
A failing intake-side VVT solenoid typically announces itself through multiple symptoms that worsen over time:
- Check Engine Light: Most commonly triggers P0010 (Intake Camshaft Position Actuator Circuit), P0011 (Intake Camshaft Position Timing Over-Advanced), P0020 (Exhaust Camshaft Position Actuator Circuit), or P0021 codes
- Rough or Unstable Idle: Engine may shake or run unevenly at idle as timing control is compromised
- Poor Fuel Economy: Reduced efficiency as the engine cannot optimize valve timing for driving conditions
- Hesitation or Sluggish Acceleration: Noticeable lack of power when accelerating, especially from a stop
- Engine Stalling: In severe cases, timing issues can cause the engine to stall, particularly at idle
- Rattling Noise on Cold Start: The cam phaser may rattle briefly on startup if oil flow is restricted
These symptoms often develop gradually. Many drivers first notice the check engine light, followed by declining drivability. Left unaddressed, a stuck VVT solenoid can lead to increased engine wear and potentially damage the timing chain or cam phaser mechanism.
Which Vehicles Does APDTY 028326 Fit?
APDTY 028326 is specifically designed for the intake side of GM 2.0L, 2.2L, and 2.4L engines. These Ecotec engines appear in numerous Chevrolet, Buick, Pontiac, Saturn, and other GM vehicles from the mid-2000s through recent model years.
Important: The exact vehicle compatibility varies by model year, trim, and engine option. Always verify fitment using the live compatibility chart on APDTY.com before ordering. Enter your year, make, model, and engine size to confirm this part matches your specific vehicle.
Common applications include (but are not limited to):
- Chevrolet Cobalt, HHR, Malibu, Equinox (with 2.0L, 2.2L, or 2.4L)
- Pontiac G6, Solstice (with 2.0L or 2.4L)
- Saturn Ion, Sky, Vue (with 2.2L or 2.4L)
- Buick LaCrosse, Regal (with 2.4L)
Note: APDTY 028327 is the matching exhaust-side VVT solenoid. If both intake and exhaust codes are present, or if you're doing preventive maintenance, consider replacing both solenoids simultaneously.
APDTY 028326 Specifications and OE Replacement Numbers
| Specification | Details |
|---|---|
| APDTY Part Number | 028326 |
| Position | Intake Side |
| Engine Compatibility | 2.0L, 2.2L, 2.4L GM Ecotec |
| Replaces GM OE Numbers | 12655420, 12628347, 12646783 |
| Condition | Brand New |
| Fitment Type | Direct Replacement |
| Sold As | Single Unit (Intake Only) |
This solenoid is engineered to meet or exceed OE specifications for fitment, performance, and durability. The direct-replacement design means no modifications are required—simply remove the old solenoid and install the new one using the factory mounting location and electrical connector.
How to Install the Intake VVT Solenoid
Replacing the intake VVT solenoid on most GM 2.0L, 2.2L, and 2.4L engines is a straightforward job that many DIYers can complete in 30-60 minutes with basic hand tools. Always consult your vehicle's service manual for specific torque specifications and procedures.
General Installation Steps:
- Disconnect the Battery: Remove the negative battery cable to prevent electrical shorts
- Locate the Solenoid: The intake VVT solenoid is typically mounted on the front or side of the cylinder head, near the intake camshaft. On most Ecotec engines, it's accessible from the top of the engine bay
- Disconnect the Electrical Connector: Press the release tab and carefully unplug the wiring harness
- Remove the Mounting Bolt: Use the appropriate socket (often 8mm or 10mm) to remove the single bolt securing the solenoid
- Extract the Solenoid: Pull the solenoid straight out. It may have an O-ring seal that stays in the bore—remove it if present
- Clean the Mounting Surface: Remove any old oil or debris from the cylinder head bore
- Install the New Solenoid: Insert APDTY 028326 with a new O-ring (if applicable) and seat it fully into the bore
- Torque the Bolt: Tighten the mounting bolt to factory specification (typically 89 inch-pounds / 10 Nm, but verify in your service manual)
- Reconnect the Electrical Connector: Ensure it clicks securely into place
- Reconnect the Battery
- Clear Codes and Test Drive: Use an OBD-II scanner to clear stored fault codes, then drive the vehicle to verify the repair
Safety Tips:
- Work on a cool engine to avoid burns from hot components and oil
- Inspect the solenoid screen for debris or sludge—heavy contamination may indicate the need for an oil change or engine flush
- If the check engine light returns after replacement, inspect wiring harness for damage and verify engine oil level and condition
Frequently asked questions
Does APDTY 028326 fit both intake and exhaust sides?
No, APDTY 028326 is designed specifically for the intake side only. For the exhaust side, you need APDTY 028327. Always verify which side is failing using your diagnostic trouble codes—P0010/P0011 typically indicate intake side issues, while P0013/P0014 point to exhaust side problems.
Can I drive with a bad VVT solenoid?
While the vehicle may remain drivable, continuing to operate with a failed VVT solenoid risks further engine damage, reduced fuel economy, and potential failure of related timing components. Address the issue promptly to avoid more expensive repairs down the road.
Will replacing the VVT solenoid clear my check engine light?
After installing APDTY 028326, you'll need to clear the stored diagnostic codes using an OBD-II scanner. If the solenoid was the root cause, the light should stay off. If it returns, further diagnosis may be needed to check wiring, oil pressure, or the cam phaser itself.
Do I need to change my oil when replacing the VVT solenoid?
If your engine oil is dirty, contaminated, or overdue for service, change it along with the solenoid replacement. VVT systems rely on clean, proper-viscosity oil to function correctly. Sludge buildup can cause repeated solenoid failure even after replacement.
A failing VVT solenoid doesn't have to mean expensive dealer repairs or a lingering check engine light. APDTY 028326 delivers OE-quality replacement for the intake side of GM 2.0L, 2.2L, and 2.4L engines, restoring smooth idle, responsive acceleration, and optimal fuel economy. With straightforward installation and direct-fit engineering, this solenoid gets your vehicle back to factory performance. Verify your vehicle's compatibility using the live fitment chart on APDTY.com, order with confidence, and say goodbye to those frustrating VVT trouble codes.