Another twist to modifying the new cars.....
http://www.autoblog.com/2015/05/20/general-motors-says-owns-your-car-software/
Thx for all the comments. For Rich Z: who can do the plug in bypass at the trans? Is this like plugging in a flash drive or something more complicated? Thx!
It's a module that plugs in at the transmission. There is a cable that runs to the transmission and this plug goes either between the cable and the transmission, or can just plug into the then of the cable itself.
You will need to lift your car to get to it, as you have to be able to get your hands up onto the driver's side of the transmission.
I understand that some people either pull a specific fuse from the fuse block or replace it with a modified fuse to accomplish the same thing. Looks up CAGS skip shift bypass fuse on Google if you want to pursue this avenue.