Ed...I've done a little research with these in the past.
<u>3</u> <u>07</u> <u>992</u>
3 is the Pontiac Dealer Region code.Not all Pontiac papers reflect this.
07 is the state Zone code...Michigan.
992 is the Dealer code...Your dealer number isn't showing up on the lists yet.
http://www.ultimategto.com/art18.htm