OK...well, first we need to clarify a few things.
The SSEi is in fact supercharged, and the Series III is only found in the new 2004 Grand Prix...as for the PCV valve. I suggest doing a search on this site, using the Search mode at the top right there....there is lots of info...
Right now I can assume that the PCV vavle is located in the same place on the 2000 as it is in the 96-99 (same engine) Series II Normal Aspirated
Can anyone confirm that?
Good luck and welcome