you still need the Tech 2 for older vehicles.
Initially their plan was to completely replace the Tech 2 with the MDI, but now it looks like they might not "back-date" the MDI, and require the dealers to keep the Tech 2's around for older vehicles, and use GDS/MDI for only the new vehicles with the mid-speed GMLAN bus.
Initially their plan was to completely replace the Tech 2 with the MDI, but now it looks like they might not "back-date" the MDI, and require the dealers to keep the Tech 2's around for older vehicles, and use GDS/MDI for only the new vehicles with the mid-speed GMLAN bus.