GM GENUINE PARTS Intake VVT Solenoid 12679099 with Seal, Retainer & Bolt — OE Fit, Corrosion-Resistant

GM Genuine Parts 12679099 is an intake variable valve timing (VVT) solenoid assembly that controls oil flow to cam phasers, supplied with its seal, retainer, and mounting bolt for correct OE installation.

This replacement VVT solenoid is engineered and validated by GM to match the original equipment calibration used on compatible Chevrolet, Buick, GMC, and Cadillac engines. It helps the engine adjust camshaft timing in response to speed and load, contributing to expected drive quality and efficiency when installed and operated as intended. The part is coated against corrosion and comes with the small hardware and sealing components needed for a proper fit.

How does this solenoid affect engine timing and performance?

The solenoid meters pressurized engine oil to the cam phasers, enabling the engine control system to advance or retard camshaft position. Correct metering ensures the timing maps GM calibrated for power delivery, fuel economy, and smooth idle are achieved.

• Regulates oil flow to intake cam phasers for timing adjustments.
• Matches OEM calibration to maintain intended performance.
• Includes seal and retainer to prevent oil leaks at the valve cover bore.

Will this unit fit my GM vehicle and install like the original?

GM Genuine Parts are designed or validated to the same specifications as factory-installed components, so the 12679099 solenoid fits compatible GM engines without modification in most cases. It comes with the retainer, seal, and mounting bolt that mirror the original hardware for an OE-style installation.

• Engineered to GM's original parts specifications for fit and function.
• Supplied with retainer, sealing O-ring, and bolt for correct assembly.
• Coated finish helps resist corrosion in the engine bay environment.

What symptoms indicate the intake VVT solenoid needs replacement?

When the VVT solenoid is failing, drivers may notice rough idle, reduced low-end torque, increased fuel consumption, or diagnostic trouble codes related to camshaft timing. Replacing with a GM Genuine Parts unit restores the intended oil control behavior when the fault source is the solenoid or its seal.

• Rough or fluctuating idle and reduced drivability under load.
• Check Engine light with camshaft timing or oil flow related codes.
• Oil seepage or leaks around the solenoid bore from a worn seal.

How long can I expect this replacement part to last?

Durability depends on engine oil condition, operating conditions, and maintenance intervals. The GM Genuine Parts solenoid is tested to meet factory standards and features a corrosion-resistant coating to extend service life when oil changes and engine care follow manufacturer recommendations.

• Constructed and validated to GM engineering standards for longevity.
• Coating helps protect against premature corrosion in the engine bay.
• Service life is improved by regular oil changes and using recommended oil grades.

Who is this for: This intake VVT solenoid assembly (GM part 12679099) is aimed at owners, technicians, and fleet managers who need a direct-fit replacement for compatible GM engines — people who prefer genuine OE-validated components for reliable installation, calibrated performance, and service life similar to the original part. It’s appropriate for routine repair, scheduled maintenance, or when diagnosing camshaft-timing faults on Chevrolet, Buick, GMC, and Cadillac vehicles where this part is specified.