PANNUOSCS Vapor Canister Vent Valve for Chevy Silverado & GMC Sierra CVS191 / 911-099 / 23103351
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Description
xOverview
Meet the PANNUOSCS vapor canister vent valve, a thoughtful replacement built to support the vapor emission system in select GM full-size pickups. It is compatible with Chevy Silverado and GMC Sierra models from 2007 through 2019, spanning 1500, 2500 and 3500 series. This valve corresponds to OEM style numbers CVS191, 911-099 and 23103351, offering a direct fit when the part numbers align with your vehicle. A 16mm vacuum connector diameter is a key check before ordering to ensure a clean match with your system.
What you may notice after installation can vary by vehicle and driving pattern, but many users report smoother idle behavior, easier starts after refueling, and a more predictable engine response during deceleration and acceleration. This vent valve is designed to work with the vehicle venting and purge cycles, integrating with hoses and mounting points when the parts line up with the OEM references.
Why this matters
Replacing a worn or faulty vent valve can help maintain steady engine behavior and keep the vapor loop operating as intended. While results depend on the overall health of the emission system and driving style, a properly matched valve supports consistent venting and purge function, which can contribute to a calmer engine feel under normal driving conditions.
Key benefits
- Direct compatibility with 2007–2019 Silverado and Sierra models, reducing guesswork during replacement
- Replicates OEM functions to support proper venting and purge cycles
- May help address symptoms like unstable idle and hard starting after refueling
- Engineered to integrate with the factory vacuum routing and hoses
What to check before purchase
- Vacuum connector diameter is 16mm — verify this matches your current inlet before placing an order
- Part numbers CVS191, 911-099, 23103351 indicate a replacement option for many GM vehicles
- Professional installation is highly recommended for best results
Quality and support
PANNUOSCS backs this vent valve with a two-year service window for returns or exchanges. If you have questions, our team replies within 24 hours with a professional, friendly answer to help you decide on the right part for your vehicle.
Warranty and usage notes
Including straightforward compatibility notes and careful fit guidance, this valve is designed to fit common GM configurations while encouraging proper installation practices. Real-world results can vary, so consider this option as a potential improvement to your current vapor system, rather than a guaranteed outcome.
FAQ
Q: What vehicles does this PANNUOSCS vent valve fit?
A: Fits 2007–2019 Chevy Silverado and GMC Sierra 1500/2500/3500; compatible with CVS191, 911-099, 23103351.
Q: Is professional installation recommended?
A: Yes, professional installation is highly recommended to ensure proper fit and function.
Shipping & Return
xReturns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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