This post will answer some of your questions:

http://www.iatn.net/forums/8/130560/is-it-still-techii-for-gm

Here are some more specifics on programming with the Tech 2:

https://drive.google.com/file/d/0B3vUvsJnM_OEZUNETFB4QV9pMFk/edit?usp=sharing&pli=1

(If you get a "please reload" dialog when accessing that document, just close the dialog...)

Here's a better list of GM's Global A vehicles, which require laptop-based GDS2 scan tool software and either the MDI or a compatible aftermarket hardware interface:

http://sandyblogs.com/techlink/?p=2919

Michael Joachim
Owner
Mike Joachim
Pelham, Alabama, USA