Your 2007 Vin should fly on the site below..
Cool service and best of all it's FREE!.
This site breaks down GM vehicle options equipped w/ your Vin also gives production #'s of like equipped vehicles..
It notes some Vins are in the database as far back as 1980 too!.
http://www.compnine.com/vid.php
I haven't tried the Part# thing...anyone w/ some older #'s handy wanna' give it a go?.
Great site to bookmark too and although the info's not completed yet it looks like they're compiling more including things like RPO listings back to 1953!.
~ Pete
--------------------
I like real cars best...especially the REAL real ones!