First you will need a copy of the v2.600 software for the upgrade. lol If you ask dealers, they will probably say "you got the latest software already." as they won't bother spending 15 minutes to update your rig or they don't have the software on hand for a start.
Forget about that driveuconnect update. It won't do much unless you are using a US version of uconnect or the one that comes with GC. You can put an vin from ages ago and it will still show no update. Nice one.
btw, I have the software on hand but haven't tried updating yet.