This is important as the application will only look for updates at the same drive letter i. One is the app, the other is the GM update disc, which is not required. If supplied with a clone, there are normally two discs. This is the update disc you need to turn the GM application into something useful. But as I said, this software as supplied does not include Saab models, so to run it successfully. This is what turns the Tech 2 into a Saab Tech 2. This in itself is incredibly useful, but it is also possible to reprogram modules within the car to change various functions and add or replace faulty modules and programme keys.
