I used the tis 2000 disc for ecm updates.
since the TIS200 has all the firmware needed for cars up to 2009, and does not need to connect to GM to pull them down.
As for the 2010 to 2013 cars, need to have a working account with GM since it will need to pull these firmware files from GM over the web, since these needed files will not be part of the 3 discs that come with it.
Hence in 2010, GM switch over to web base programming from computer based Tis2000 , and was the end of the TIS 2000 having the needed files internal for the cars from that point forward.
So if you have a 2010 or later vet, then just get a $40 subscription to TDS SPS for 2 years, and the Tech II will be used in pass through mode for over the web programming instead .
Myself, have a Auto Scanner Tool TIS2000 built into a VM shell on full working XP software on a win 10 machine so it can connect to the internet, have a GM account, so will pull any firmware that is needed/it does not have for later 2010 cars, from GM over the web.