Found a web page with OBD 2 info www.obdii.com <http://www.obdii.com>
The company also sells a OBD 2 scanner for $250
The scanner must be used with a laptop.
Input; SAE J 1850-VPW OBDII signal standard
http://www.bb-elec.com <http://www.bb-elec.com>
1996 and later GM
Don