PANNUOSCS Vapor Canister Vent Valve P0446/CVS191 for Chevy Silverado & GMC Sierra 2008-2019 — Direct-Fit EVAP Solenoid, 16mm Conne

PANNUOSCS Vapor Canister Vent Valve (P0446/CVS191) is a direct-fit EVAP vent solenoid designed to restore proper fuel vapor routing on compatible Chevy Silverado and GMC Sierra trucks.

This vent valve/solenoid controls the flow of fuel vapors from the charcoal canister to the EVAP system, helping eliminate check-engine codes related to P0446-style faults when the original unit fails. It’s offered as a replacement for OE numbers including 911-099, 23103351, CPV149, CVS191, and PV896. Before ordering, compare OE references and connector dimensions to ensure the valve matches your truck’s configuration.

Will this valve fit my Silverado or Sierra?

Compatibility covers many model years and heavy-duty trims, but fitment depends on the exact OE number and connector size. Confirm your vehicle’s model year and compare the part numbers listed to your existing valve now to avoid returns.

• Compatible models: Chevrolet Silverado 1500/2500HD/3500HD (2008–2019) and GMC Sierra 1500/2500HD/3500HD (2008–2019)
• Replacement OE: 911-099, 23103351, CPV149, CVS191, PV896
• Connector size: 911-099 / P0446 = 16mm; 911-237 / P0449 = 15mm — verify before purchase
• Compare images and OE numbers supplied in listing to your existing part

How does this vent solenoid help fix a P0446 code?

The valve re-establishes proper venting between the charcoal canister and the EVAP control system so the vehicle’s diagnostics can perform leak detection and purge functions correctly. Installing a functional vent valve commonly eliminates P0446-related trouble codes when the original solenoid is stuck or leaking.

• Restores controlled venting of fuel vapors to the EVAP system
• Allows onboard diagnostics to complete leak checks and purge cycles
• Helps prevent vapor escape that can trigger check-engine lights

What should I check before installation?

Verify the vacuum connector diameter and OE reference numbers; mismatched connectors or incorrect part numbers are the most common causes of fitment issues. Also inspect mounting points, the electrical connector shape, and surrounding vacuum hoses for compatibility.

• Measure vacuum port diameter (15mm vs 16mm) to match P0449/P0446 variants
• Confirm electrical plug alignment and clip locations
• Inspect mounting tabs and bracket clearance in the engine bay
• Replace any brittle vacuum lines during installation for best results

What warranty or support comes with the part?

PANNUOSCS provides a 12-month free replacement policy for this EVAP purge solenoid valve, and customer support is available if you need help determining fitment or troubleshooting after installation. Keep the purchase information handy for warranty claims.

• 12-month free replacement coverage
• Customer support via the seller’s messaging channel
• Return assistance and guidance for fitment confirmation

Who is this for: This PANNUOSCS P0446 vent valve is aimed at owners and technicians of Chevrolet Silverado and GMC Sierra trucks (2008–2019) who need a reliable direct-replacement EVAP vent solenoid. It’s suited for do-it-yourself mechanics, independent repair shops, and fleet maintenance teams that require a correct-fit component with clear OE cross-references and a vendor-backed replacement policy. Before ordering, ensure your truck’s OE number and vacuum connector size match the listing to guarantee a smooth installation.