1) GM started utilizing the Tech 2 in service departments in 1996 (1995 in California), as that is when they went to the OBDII protocol.
Repeatedly you have stated yours works on 1999 - 2013;
Then you say;these will work on any gm based vehicle from 1999 to 2013. i have heard from people that have used them on many gm based cars and they all worked properly.
Which is why Leon above asked;these will not work for vehicles before 1999. these cover from 1999 to 2013.
Now the question becomes, if yours does not work for anything 1996 – 1998, is that by your intention (as you only had those model years, so you only ordered software/card for those years?)? OR, is this a limiting capability of the tool? If it is the later, that is one major red flag for me right there. It should work on anything 1996+Why does it NOT go back to 1996, which was the beginning of OBD2?
2) You keep saying that you called them up, selected from a list of vehicles, and had them prep and load the software for your specific tool (along with something about a “card”).
I’m not sure I follow this. My Tech 2 works in EVERY GM vehicle from 1996 and up (well through 2009 anyway). I don’t need special software loaded to the tool to access a specific vehicle/platform. I plug in to the DLC, it sees it, I use it to do what I need it to do. Never once in my some ~20 years either in dealer service or on my own (freelancing), with a Tech 2 at my disposal (whether it be my own, or a dealer unit), run into an issue where a GM vehicle I plugged into it, wasn’t supported by the tool, to where I had to run over to the TIS terminal to get it updated! I feel with relative confidence that I can safely say, in that time, mine has been plugged into pretty much every GM platform that can roll into a service department (whether in OBDII or CANbus setup). From GMNA vehicles, to GMHolden vehicles. Matter of fact, several people on here have had their cars (Bonneville's or G8's), probed by my T2.
So this is where some of us are questioning things. It’s not meant to be an argument or debate. You’ve got a couple of people here (Leon, Andrew, and Myself), who are actually pretty familiar with the tool. In the case of Leon and I, both of us work/have worked in a GM service department and lived with the tool day in, day out.














