are you looking for just a scan tool or do you want a flasfhing program as well? if you want just a scanner look for autotap. not sure of the web addresse any more bet it's a farly good program and wasn't to expense last time I looked.
I have a 2000 camaro run hp tuner. it is a scan tool as well as a flasher for tuning everything. if you want a flasher I would highly recommend this program as it is the best out for ls1 engine's to date. however it is not a cheap program at 500 buck's. they web sit is www.hptuners.com I would suggest at lest giving it a look and reading some of the forum's about it there.