When shopping for intake and exhaust camshaft solenoids, the goal is reliable control of variable valve timing to reduce rough idle, improve start-up behavior, and optimize fuel economy. This guide highlights solid options for GM Ecotec 2.0L, 2.2L, and 2.4L engines. The top picks are best for enthusiasts restoring older Equinox, Malibu, Cobalt, or GMC Terrain models, as well as drivers seeking a direct OEM-style replacement. Below is a quick comparison table to help you decide at a glance.
| Product | Best For | Key Benefit |
|---|---|---|
| A-Premium VVT Kit | Multi-model GM vehicles | Complete intake & exhaust solenoid set with wide vehicle fitment |
| Intake Exhaust Actuator Kit | Chevy/GMC/Pontiac/Saturn engines | Includes camshaft & crankshaft sensors for comprehensive fit |
| 2-Pack VVT Solenoids | Budget-minded replacement | Two solenoids with broad compatibility |
| YAOPEI Solenoid Kit | OEM-style replacement | Direct replacement for common 12655420/12655421 |
| Intake Exhaust VVT Solenoid Kit | Malibu, Impala, and related models | Replaces 12655433/12655434 variants |
A-Premium VVT Intake Exhaust Camshaft Solenoid Kit
The A-Premium kit targets a broad GM mix, including Chevrolet Equinox, Malibu, Cobalt, and GMC Terrain, plus several Buick and Pontiac models. It provides both intake and exhaust solenoids with compatible reference numbers (12655420 and 12655421) for easy cross-checking. This option is best for owners who want a complete replacement set to restore PWM oil flow control and reduce sensor-related fault warnings. Caution: verify exact engine type and year range to avoid mismatches with non-Ecotec engines.
Intake Exhaust Actuator VVT Solenoid Kit With Sensors
This kit adds camshaft and crankshaft sensors along with the VVT solenoids, providing a broader diagnostic footprint for common P0010/P0011/P0013/P0014 faults. It is well suited for Chevrolet, GMC, Pontiac, and Saturn engines with 2.0L/2.2L/2.4L Ecotec configurations. Choose this if you want sensor coverage in one package and you’re working through multiple related fault codes. Limitation: sensor compatibility should be double-checked against your vehicle’s exact VIN and year.
2-Pack VVT Solenoid Intake Exhaust Camshaft Position Actuator
These 12V, 2-pin solenoids replace both intake and exhaust units (12655420/12655421) and are designed for GM Ecotec engines from 2.0L to 2.4L. They emphasize PWM oil-flow control and robust O-rings for oil sealing. Best for drivers seeking a cost-effective, pair-based replacement for multiple Ecotec models, including Equinox, Malibu, and Terrain. Better for: someone replacing both solenoids at once to restore symmetrical valve timing. Caution: ensure the pair’s connector types match your vehicle’s harness.
YAOPEI VVT Solenoid Intake & Exhaust Kit
The YAOPEI kit replicates common 12655421 and 12655420 variants for Chevrolet Equinox, Malibu, Cobalt, G3-series, and GMC Terrain among others. It is positioned as a straightforward OEM-style replacement, suitable for owners seeking reliable function without bespoke features. Best for: quick, direct swaps when you want to minimize diagnostic downtime. Limitation: verify exact connector cap color and fitment for your specific engine year.
Intake Exhaust VVT Solenoid Kit For Malibu And More
This kit targets Malibu, Impala, and related GM/ Buick/Cadillac lineups with a 12655433/12655434 variant replacement. It provides a route to refresh valve timing control across multiple 2.0L/2.5L engines. Best for: owners with models that specifically reference 12655433/12655434, or where 2.0L/2.5L engines overlap. Caution: not all 12655433/12655434 vehicles use the same connector scheme, so verify before purchase.
Buying Guide
- Vehicle compatibility: Confirm your engine displacement (2.0L, 2.2L, or 2.4L Ecotec) and model year. The same part number may exist across different vehicle lines but with distinct connector standards.
- Replacement scope: Decide if you need a single solenoid or a complete intake and exhaust kit, and whether you also want cam/crank sensors for broader diagnostics.
- Connector and seal integrity: Look for 2-pin plugs, Viton O-rings, and robust housings to minimize oil leaks and electrical issues.
- Cross-reference references: Use OEM references like 12655420 and 12655421 to verify compatibility with your GM Ecotech engine family.
- Installation considerations: Some sets include additional sensors or require engine oil circuit checks; plan for potential gasket or seal replacements during installation.
FAQ
Which solenoid is required for an Ecotec 2.0L engine?
Most 2.0L Ecotec engines use the intake 12655420 and exhaust 12655421 solenoids. Check your VIN and service documentation to confirm exact numbers.
Can I replace only one solenoid if I have rough idle?
Yes, but many drivers replace both intake and exhaust solenoids together to restore balanced oil flow and reduce recurring faults.
Do these kits include sensors?
Some kits include camshaft or crankshaft sensors; others are solenoid-only. Review product features to confirm what’s included.
How do I know if a solenoid is failing?
Common indicators include misfire, rough idle, reduced fuel economy, and fault codes like P0010 to P0014. Use diagnostic data to pinpoint valve timing faults.
Is a 2-pack better than a single solenoid?
For most Ecotec engines, replacing both intake and exhaust solenoids at the same time provides a cleaner restore of PWM oil flow and timing control, especially if symptoms affect multiple circuits.