Tech2 GM Diagnostic Scanner is the same tester GM 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 2011.
The opel cars supported year range is 1997-2014
How to do a gm tech2 self test? Following the steps.
2) connect the self-test adapter with tech 2, then power on machine.
3)Enter Main manu then choose F4: tool options .
5)Press exit to continue.