HY-SPEED Camshaft Position Actuator Solenoid (VVT Valve) 12615873 — Direct Replacement for GM/Isuzu with 12‑Month Warranty

HY-SPEED Variable Valve Timing (VVT) camshaft position actuator solenoid designed to restore proper timing control in compatible GM and Isuzu engines.

This direct-replacement camshaft position actuator solenoid (also called a VVT valve or camshaft actuator solenoid) fits a range of mid-2000s GM and related vehicles. It is supplied new by HY-SPEED, carries multiple OE cross-reference numbers, and is intended to replace the solenoid installed in the cylinder head that controls oil flow to the variable cam phaser. The part ships as a single solenoid and comes with a 12-month warranty and a returns policy.

Which vehicles and engines does this HY-SPEED solenoid fit?

This solenoid matches a variety of Chevrolet, GMC, Isuzu, Oldsmobile and Saab platforms from roughly 2002–2012. Fitment covers several engine displacements and both four- and six-cylinder applications; confirm compatibility using your vehicle’s year, engine code, or the OEM reference numbers listed below.

• Common fits: Trailblazer, Colorado, Canyon, Rainier, Envoy, Hummer H3/H3T, Isuzu Ascender/i-280/i-290/i-350/i-370, Oldsmobile Bravada, Saab 9-7x.
• Engine sizes included: 2.8L, 2.9L, 3.5L, 3.7L and 4.2L across specified model years.
• Check OE cross numbers: 12568078, 12576768, 12597025, 12602516, 12615873 (and listed alternate formats).

What does this solenoid do and why might you replace it?

The solenoid meters engine oil to the variable cam phaser, enabling the engine control system to adjust cam timing. A failing solenoid can cause timing errors, rough idle, or diagnostic trouble codes related to camshaft position; replacing the unit can restore proper oil control to the phaser mechanism.

• Controls oil flow to the cam phaser for variable valve timing.
• Direct replacement design intended for cylinder-head mount locations.
• Used to address timing-related faults and restore normal VVT function.

How do I confirm fitment before ordering?

Match the part to your vehicle using year, make, model, engine displacement and the OE numbers listed in the product listing. If you have the original solenoid, compare the electrical connector shape and mounting style; when in doubt, provide your VIN to the seller for verification.

• Compare OE numbers shown with your current part’s stamping or part sticker.
• Verify physical connector type and mounting orientation against your existing unit.
• Contact seller with VIN and engine code for final fitment confirmation.

What should I expect when installing this HY-SPEED solenoid?

Installation is a bolt-in swap where the solenoid is mounted in the cylinder head; basic hand tools and a safe workspace are typically all that’s required. Follow torque specs from a repair manual and ensure the engine is cool and oil passages are clean before fitting the replacement.

• Installation: remove electrical connector, unbolt old solenoid, install new unit, and reconnect.
• Tip: clean surrounding oil passages and use factory torque values for fasteners.
• After fitment, clear any stored codes and verify engine runs smoothly without camshaft-related DTCs.

Who is this for: Professional mechanics, independent shops and experienced DIYers working on compatible GM-, Isuzu- or Saab-based vehicles that use a cylinder-head mounted VVT solenoid. It’s aimed at anyone replacing a worn, noisy or electrically faulty camshaft actuator solenoid who needs a cost-effective, new aftermarket replacement that lists the common OEM cross-reference numbers.