I'm asking because none of the auto parts shops in my area stock a PCV for my 2005, and some don't even think it exists. The counter guys at AZ and CAP told me I didn't have one . NAPA wanted another $3 to have one shipped from another vendor, Advanced isn't listing anything, and my nearest Chevy dealer needed to get one from another dealer 50 miles away (who only had 2). Rockauto seems to be the only outfit that appears prepared to ship one out today. I think of a PCV as a common low-cost maintenance item, and normally replace them proactively somewhere around 100K. The Aveo owner manual doesn't specifically list it as a maintenance item, and maybe that's why they're not getting replaced very much. Does anyone know of any other reason why these aren't more commonly available?