so to follow up on this sort of, I have been using the vxdiag and a hacked version of GDS2, I could finally get the gds2 software to run but it would show the vxdiag as "not supported by gm" so after screwing around with that trying to get it to work I bought one of the clone MDI2 from chinacardiag, FINALLY after spending another hour trying different things I discovered the vxdiag device has to be plugged into the tablet via usb, then I have to open the gds2 software, if the vxdiag is not connected gds2 wont run and it just errors out, so once the vxdiag is plugged in and gds2 is started I can unplug the vxdiag and plug in the clone mdi2, it gives me a small error that i can ignore and walla! it works with my 2018



nice because gds2 cost like $795 a year otherwise and even a 3day subscription is like $70, this hacked version has like 9750 days on it. I am able to run all the diagnostics just like a tech2 can on the older vehicles, all the vehicles went to gds2 in 2014
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