GM Tech-2 is the same tester Technicians use to diagnose GM vehicles. The Vetronix Tech 2 comes with Authentic GM software and provides support for on-board diagnostics on all GM systems 1992 thru 2014.
How to process GM Tech2 Diagnostic Scanner RS232 self-test?
1.Please use the adapter like the following pic shows.Or please make a network cable like this,as we have customer before have the cable problem.
2.Go to main menu,choose tool options
3.Tool options,then choose self test.