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The Tech 2 remains an essential tool through at least the 2010 model year. The GM MDI will not support past models when its diagnostic capabilities are introduced. And, the This means you can use it as your programming tool, while your Tech 2/CANdi remains available for diagnostics and other ThMDI can be used only in the Pass-Thru method. .Additional information will be supplied in future. HOW WILL THE GM MDI BE USED? ehicles fromprevious model years. Remote programming with the Tech 2 will continue to be supported for use on all 2007 and previous vehicles.syi