I have same problem .All ( gm cars)There is no choose programming

Hi Gene, to program GM, you need to use J2534 with the OEM software from the following website: http://www.gmtechinfo.com/ 

            Hi Gene, support gave you the proper website to take a subscription where you can choose amount of time just to program I think two day price is $55 US. You'll have the option also to get programming along with tech2Win or GDS2 for more money but should ask support if maxisys pro J2534 works with that software (don't know but final instructions might need a module set-up capability).First of all need J-box drivers installed on your PC from that manufacturer,second take subscription which is going to check PC environment use ethernet to connect from their j-box not bluetooth. GM will ask if you want to install Midi and tech 2 win drivers which you can skip if your not using them then will force you to make sure Java script is current (do before subscription). There is no program to install as everything will be done right off their servers if hardware working and your able to pick your device even if unknown or non-validated. As far as programming the ECU that your asking about can't verify that it's available and maybe not even necessary (plug it in and check) but if blank put back old ECU for server to check first before replace. Hope this helps  to get started.