Received my clone Tech2 scanner so was finally able to clear Theftlock on my replacement OEM Bose navigation head unit I swapped out when the screen failed on the one in my 2011 Grandsport.
The following are screen shots from the Tech 2 showing how to remove the Theftlock code and relearn the VIN on the replacement radio.
It’s Tech2 software version 33.004
Select Diagnostic in Main Menu
2011 Passenger Car Chevrolet
Select a product line: Y
Body control module
Clear radio theft information
Radio theft information is cleared