Was able to find a manual for a GM Tech 2...
http://register.otctools.com/364849/Tech-2UserGuide.pdf
Seems like they'd be too expensive for a DIY'er. Here's a discussion thread on Corvette forum:
http://forums.corvetteforum.com/c6-t...-where-to.html
How updated would it need to be for a 97?
-Ed