The tech-2 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 2008 Features: Authentic gm software in the tech 2 flash means the most comprehensive diagnostic software available for late model gm vehicles. Support for on-board diagnostics on all gm systems 1992 thru current year. Removable hardware modules provide insurance against scan tool obsolescence. Large, easy-to-read backlit screen. Rs232 & rs485 ports provide the avenue to connect future devices to your tech 2 flash. Ability to capture stored dtcs, freeze frame, and failure record for later review. Ability to view the status of vehicle diagnostic tests as they run. Bi-directional The authentic gm 1992-current year software will provide full bi-directional control when performing power train, chassis, and body diagnostics.