APDTY 027046-027048 is a brand new variable valve timing (VVT) solenoid pair that includes both intake and exhaust side solenoids for select 2013-2018 GM vehicles. This set replaces OE part numbers 12627116, 12655433, 12662737 (intake) and 12627117, 12655434, 12662736 (exhaust), and directly addresses common check engine light codes related to camshaft timing issues, restoring proper engine performance and fuel economy.
Key Takeaways
- Includes both intake and exhaust VVT solenoids in one complete set
- Fits 2013-2018 Buick, Cadillac, Chevrolet, and GMC models with 2.0L or 3.6L engines (see compatibility list)
- Replaces GM OE numbers 12627116, 12655433, 12662737, 12627117, 12655434, 12662736
- Fixes common VVT-related fault codes: P0010, P0011, P0020, P0021
- Clean engine oil is critical for proper VVT solenoid operation and longevity
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What Does a VVT Solenoid Do?
Variable valve timing (VVT) solenoids control the flow of engine oil to the camshaft phasers (also called cam actuators), which adjust camshaft timing on the fly. By advancing or retarding valve timing, the engine computer optimizes performance, fuel economy, and emissions across different RPM ranges. Each VVT solenoid is an electronically controlled valve that responds to pulse-width modulated signals from the powertrain control module (PCM). When the solenoid receives the signal, it opens to allow pressurized engine oil to flow to the camshaft actuator, which rotates the camshaft slightly relative to the timing chain or belt.
Modern GM engines with dual overhead cams typically have separate VVT solenoids for the intake and exhaust camshafts on each cylinder bank. The APDTY 027046-027048 set provides both the intake and exhaust solenoids, so you can replace both at once and ensure consistent, reliable timing control.
What Are the Symptoms of a Failing VVT Solenoid?
When a VVT solenoid fails or becomes clogged, the engine loses precise control over valve timing. Common symptoms include:
- Check engine light with codes P0010, P0011, P0020, P0021, or related camshaft position/timing codes
- Rough idle or engine stumble, especially when cold
- Reduced power and acceleration as the engine cannot optimize timing under load
- Poor fuel economy due to inefficient combustion timing
- Engine rattle or knocking on startup if timing is significantly off
- Increased emissions and potential emissions test failure
These symptoms often worsen over time. Left unaddressed, a stuck VVT solenoid can cause the engine to run in a default "limp mode" timing map, further degrading drivability and efficiency.
Which Vehicles Does APDTY 027046-027048 Fit?
The APDTY 027046-027048 VVT solenoid set is confirmed compatible with the following GM vehicles equipped with 2.0L turbo or 3.6L V6 engines:
| Make | Model | Years |
|---|---|---|
| Buick | Envision | 2016-2017 |
| Buick | Regal | 2014-2017 |
| Cadillac | ATS | 2013-2017 |
| Cadillac | CT6 | 2016-2018 |
| Cadillac | CTS | 2014-2017 |
| Chevrolet | Camaro | 2016-2017 |
| Chevrolet | Colorado | 2015-2017 |
| Chevrolet | Impala | 2014-2017 |
| Chevrolet | Malibu | 2013-2017 |
| Chevrolet | Malibu Limited | 2016 |
| GMC | Acadia | 2017 |
| GMC | Canyon | 2015-2017 |
Important: This list reflects the data provided for this APDTY SKU. Some model years or trim levels within these ranges may use different engine configurations. Always verify fitment using the live compatibility chart on the product page, or confirm your vehicle's VIN and engine code before ordering.
APDTY 027046-027048 Specifications and OE Cross-Reference
| APDTY Part Number | 027046-027048 |
| Contents | Intake VVT Solenoid + Exhaust VVT Solenoid (set of 2) |
| Condition | Brand New |
| Replaces OE Numbers (Intake) | 12627116, 12655433, 12662737 |
| Replaces OE Numbers (Exhaust) | 12627117, 12655434, 12662736 |
| Actuation Medium | Engine oil (hydraulic) |
| Mounting | Cylinder head (bolts directly to camshaft actuator oil passages) |
Each solenoid is a direct OE-fit replacement, designed to meet or exceed original equipment specifications for electrical resistance, flow rate, and durability.
How to Replace VVT Solenoids: Overview and Best Practices
Replacing VVT solenoids is a straightforward repair for mechanically inclined DIYers and professional technicians. The solenoids are typically located on the front or top of the engine, bolted into the cylinder head near the camshaft actuators. General steps include:
- Disconnect the battery negative terminal and wait a few minutes to discharge residual voltage.
- Locate the solenoids. On inline engines, you will find one intake and one exhaust solenoid. On V6 engines, there may be four solenoids total (one pair per cylinder bank).
- Unplug the electrical connector from each solenoid. Press the release tab and pull straight off.
- Remove the retaining bolt (typically a 10mm or 8mm hex) and carefully extract the solenoid. Inspect the mounting area and O-ring seal for debris or damage.
- Install the new solenoids from the APDTY 027046-027048 set. Lubricate the O-ring with clean engine oil, insert the solenoid squarely into the bore, and torque the bolt to factory specification (usually 80–90 in-lbs).
- Reconnect the electrical connectors, ensuring they click into place.
- Clear diagnostic trouble codes using an OBD-II scanner, then start the engine and verify normal operation. Monitor for any returning codes.
Critical: VVT solenoids use engine oil to actuate the camshaft phasers. It is very important to inspect the engine oil and verify it is clean. Dirty, sludgy, or low oil will cause premature solenoid failure and may damage the camshaft actuators. Always change the oil at the recommended service intervals and use the factory-recommended oil viscosity and specification. If the oil is contaminated or the engine has a history of neglected maintenance, perform a complete oil and filter change before or immediately after installing new VVT solenoids.
Why Clean Engine Oil Is Critical for VVT System Longevity
VVT solenoids and actuators are precision hydraulic components that rely on clean, pressurized engine oil. Contaminants such as carbon deposits, metal particles, or sludge can clog the solenoid screens, restrict oil flow, and prevent the actuators from moving smoothly. Over time, this leads to:
- Sticking or sluggish solenoid response
- Erratic camshaft timing and performance issues
- Premature wear of the camshaft actuator internals
- Repeat fault codes even after solenoid replacement
To protect your investment in the APDTY 027046-027048 solenoid set and maintain optimal engine performance:
- Change oil and filter at the intervals specified in your owner's manual (typically every 5,000–7,500 miles, or more frequently for severe-duty driving).
- Use the oil viscosity and specification recommended by GM (commonly dexos1 Gen 2 5W-30 for these engines).
- Inspect the old solenoids and actuator screens for sludge or debris. If contamination is present, consider an engine flush or additional short-interval oil changes.
- Address any oil leaks or consumption issues promptly to maintain proper oil level and pressure.
Clean oil is the single most important factor in VVT system reliability. Neglecting oil maintenance will cause new solenoids to fail prematurely, wasting time and money.
Frequently asked questions
Do I need to replace both intake and exhaust VVT solenoids at the same time?
While you can replace a single failed solenoid, replacing both together (as included in the APDTY 027046-027048 set) is highly recommended. If one has failed, the other is often close behind due to similar age and operating conditions. Replacing both ensures consistent performance and avoids a second repair soon after.
Will installing new VVT solenoids clear my check engine light?
New solenoids will fix the mechanical cause of VVT-related codes (P0010, P0011, P0020, P0021), but you must clear the codes with an OBD-II scanner or by disconnecting the battery. If codes return after clearing, verify clean engine oil, proper oil level, and that all electrical connectors are secure.
Can I use this solenoid set on engines other than those listed?
The APDTY 027046-027048 set is confirmed compatible only with the vehicles listed in the fitment table above. Other GM engines may use different solenoid designs or mounting configurations. Always verify fitment by VIN or engine code before ordering.
What if I still get VVT codes after replacing the solenoids?
If codes persist, check for dirty or low engine oil, a clogged camshaft actuator screen, mechanical timing chain issues, or wiring/connector problems. In rare cases, the camshaft actuator itself may be faulty and require replacement. Proper diagnosis with a scan tool that displays live VVT data is essential.
The APDTY 027046-027048 VVT solenoid set delivers a complete, cost-effective solution for restoring variable valve timing performance on 2013-2018 GM vehicles. By replacing both intake and exhaust solenoids together, you eliminate common fault codes, improve drivability, and protect your engine from inefficient timing. Remember: clean engine oil at proper intervals is the key to long VVT system life. Order your APDTY 027046-027048 set today and get your GM vehicle running smoothly again.
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