The Multiple Diagnostic Interface (MDI) is GM’s Diagnostic and Reprogramming interface.
The GM MDI when coupled up with the software application 'GDS-2' allows your shop to be 'dealer level' capable on all the above listed GM cars. Scan, pull codes, graph data and have all bi-directional controls available for all vehicle systems including Powertrain, Body, Chassis and Network. This tool will also allow you to re-program controllers as long as you have internet access on the laptop your MDI/GDS application is installed on.
** These images are for illustration purposes only