The APDTY 027048 Variable Valve Timing Exhaust Solenoid is a direct-replacement component designed to restore proper camshaft timing control on the exhaust side of select 2013-2018 GM vehicles. This single exhaust-side solenoid corrects poor engine performance, rough idle, and check-engine lights caused by failed or sticking VVT solenoids, replacing OE part numbers 12627116, 12655433, and 12662737.
Key Takeaways
- APDTY 027048 is a single exhaust-side VVT solenoid; for both intake and exhaust solenoids, see APDTY-027046-027048 pair kit
- Fits 2013-2018 Buick, Cadillac, Chevrolet, and GMC models—always verify exact fitment using the compatibility chart before purchase
- Replaces GM OE numbers 12627116, 12655433, 12662737 and aftermarket equivalents 916-937, VVT296, VTS1156
- Common failure symptoms include rough idle, reduced fuel economy, hesitation, and P0011 or P0014 trouble codes
- Direct-fit replacement for exhaust camshaft timing control with no programming required
Buy APDTY 027048 directly from APDTY
What Does the Variable Valve Timing Exhaust Solenoid Do?
The variable valve timing (VVT) solenoid controls the flow of engine oil to the camshaft phaser, allowing the engine computer (ECM/PCM) to advance or retard valve timing dynamically. The exhaust solenoid specifically manages timing on the exhaust camshaft, optimizing engine performance, fuel economy, and emissions across all RPM ranges.
When the ECM detects the need for timing adjustment—such as during acceleration, cruising, or cold starts—it sends electrical signals to the VVT solenoid. The solenoid opens or closes internal passages, directing pressurized oil to rotate the camshaft phaser and shift valve timing. This precise control reduces overlap between intake and exhaust valve events, improving combustion efficiency and reducing harmful emissions.
A failed exhaust VVT solenoid loses its ability to regulate oil flow, causing the camshaft phaser to stick in one position or operate erratically, triggering performance issues and fault codes.
What Are the Symptoms of a Failing VVT Exhaust Solenoid?
A malfunctioning exhaust VVT solenoid produces noticeable drivability problems and diagnostic trouble codes. Common symptoms include:
- Check Engine Light: Most often P0011 (Exhaust Camshaft Position Timing Over-Advanced) or P0014 (Exhaust Camshaft Position Timing Over-Retarded), though related codes like P0010 may also appear
- Rough or Unstable Idle: Engine may shake, vibrate, or run unevenly at idle as exhaust valve timing drifts out of specification
- Hesitation or Stumbling: Poor throttle response during acceleration due to incorrect exhaust valve timing
- Reduced Fuel Economy: Inefficient combustion from mistimed exhaust valve events increases fuel consumption
- Engine Rattle on Cold Start: Camshaft phaser may rattle when oil pressure is low if the solenoid cannot properly lock the phaser position
- Failed Emissions Test: Incorrect valve timing raises tailpipe emissions, causing inspection failures
These symptoms often worsen gradually as internal solenoid components wear, carbon deposits accumulate, or electrical connections corrode. Diagnostic scan tools will typically display active or pending VVT-related codes when the solenoid fails.
Which Vehicles Does APDTY 027048 Fit?
APDTY part number 027048 is confirmed compatible with the following GM vehicles. Always verify exact fitment using the live compatibility chart on the product page, as trim level, engine type, and production date may affect application:
| Year Range | Make | Model |
|---|---|---|
| 2016-2017 | Buick | Envision |
| 2014-2017 | Buick | Regal |
| 2013-2017 | Cadillac | ATS |
| 2016-2018 | Cadillac | CT6 |
| 2014-2017 | Cadillac | CTS |
| 2016-2017 | Chevrolet | Camaro |
| 2015-2017 | Chevrolet | Colorado |
| 2014-2017 | Chevrolet | Impala |
| 2013-2017 | Chevrolet | Malibu |
| 2016 | Chevrolet | Malibu Limited |
| 2017 | GMC | Acadia |
| 2015-2017 | GMC | Canyon |
This solenoid is designed for select GM four-cylinder and V6 engines with dual VVT systems (separate intake and exhaust solenoids). Note: APDTY 027048 is the exhaust-side solenoid only. If both intake and exhaust solenoids require replacement, consider APDTY-027046-027048 for the complete pair.
APDTY 027048 Specifications and OE Cross-Reference
This replacement exhaust VVT solenoid meets or exceeds OE specifications for direct fitment and reliable operation:
| Specification | Details |
|---|---|
| APDTY Part Number | 027048 |
| Component Type | Variable Valve Timing Solenoid (Exhaust Side) |
| Quantity | Single solenoid (exhaust only) |
| Condition | Brand New |
| OE Part Numbers Replaced | 12627116, 12655433, 12662737 |
| Aftermarket Equivalents | 916-937, VVT296, VTS1156 |
| Fitment | Direct replacement for select 2013-2018 Buick, Cadillac, Chevrolet, GMC |
The solenoid features OE-style electrical connector and mounting configuration for straightforward installation with no modifications. Internal valve construction is designed to withstand high engine oil temperatures and pressures encountered during normal operation.
How to Replace the VVT Exhaust Solenoid: General Overview
Replacing the exhaust VVT solenoid on most GM applications is a straightforward procedure requiring basic hand tools. This is a general overview—always consult your vehicle's factory service manual for torque specifications and model-specific procedures.
- Disconnect the Battery: Remove the negative battery terminal to prevent accidental electrical shorts during removal.
- Locate the Solenoid: The exhaust VVT solenoid is typically mounted on the cylinder head near the exhaust camshaft. On V6 engines, each bank may have its own exhaust solenoid. Refer to your service manual or the old solenoid's position.
- Disconnect the Electrical Connector: Press the release tab and carefully pull the wiring harness connector straight off the solenoid.
- Remove the Mounting Bolt: Use the appropriate socket (commonly 8mm or 10mm) to remove the single bolt securing the solenoid to the cylinder head.
- Extract the Old Solenoid: Pull the solenoid straight out. Inspect the O-ring seal; if it remains in the cylinder head bore, remove it with needle-nose pliers.
- Inspect and Clean: Check the solenoid bore for debris or sludge. Wipe clean with a lint-free cloth. Inspect the solenoid screen (if externally visible) for blockage.
- Install the New Solenoid: Lubricate the new O-ring with clean engine oil. Insert APDTY 027048 into the cylinder head bore, ensuring proper alignment.
- Torque the Mounting Bolt: Install and tighten the retaining bolt to factory specification (commonly 89 in-lb or 10 Nm—verify in your service manual).
- Reconnect the Electrical Connector: Push the harness connector onto the solenoid until it clicks into place.
- Reconnect the Battery and Clear Codes: Reconnect the negative battery terminal. Use a scan tool to clear any stored VVT fault codes.
- Test Drive: Start the engine and verify smooth idle. Road-test the vehicle and confirm no check-engine light returns.
Important: If replacing only one solenoid, inspect the condition of the intake solenoid (and opposite-bank solenoids on V6 engines). If multiple solenoids have failed or show wear, consider replacing all at once to prevent repeat repairs.
Frequently asked questions
Does APDTY 027048 come as a pair or single solenoid?
APDTY 027048 is a single exhaust-side VVT solenoid. For both the intake and exhaust solenoid together, see APDTY part number 027046-027048, which includes the pair.
Will this solenoid work on my 2015 Chevrolet Malibu?
APDTY 027048 is listed as compatible with 2013-2017 Chevrolet Malibu models. However, always verify exact fitment using the live compatibility chart on the product page, as engine type and build date can affect application.
What trouble codes indicate a bad exhaust VVT solenoid?
Common codes include P0011 (Exhaust Camshaft Position Timing Over-Advanced), P0014 (Exhaust Camshaft Position Timing Over-Retarded), and sometimes P0010 (Exhaust Camshaft Position Actuator Circuit). Always diagnose with a scan tool and verify solenoid operation before replacement.
Can I drive with a faulty VVT solenoid?
Driving with a failed VVT solenoid is not recommended. While the vehicle may still operate, you will experience poor performance, reduced fuel economy, and potential engine damage from incorrect valve timing. Replace the solenoid promptly when fault codes appear.
The APDTY 027048 Variable Valve Timing Exhaust Solenoid restores proper camshaft timing control on select 2013-2018 GM vehicles, eliminating rough idle, hesitation, and check-engine lights caused by worn or clogged OE solenoids. With direct-fit construction and OE-equivalent performance, this replacement solenoid provides a cost-effective repair for DIYers and professional technicians alike. Verify your vehicle's compatibility using the chart on the product page, and restore smooth, efficient engine operation with APDTY 027048.