The NOS AC CV768C PCV Valve GM 648750 is a brand new old stock (NOS) product manufactured by General Motors (GM). The valve has a manufacturer part number of 6487503 and CV768C, making it a genuine GM part designed for vehicles. It falls under the category of valvetrain components, specifically in the engines and engine parts section of the eBay Motors & Parts & Accessories storefront. This PCV valve is a highly sought-after item for car enthusiasts looking to replace or upgrade their vehicle's engine parts with authentic GM components.