[BR3W CITY]

Your tune will most likely be done with HP Tuners, or possibly EFI Live. Either of those put the "Burden" of the tool on the tuner, not the customer. The tuner owns the cables/box and software on his laptop, and plugs into your ECM, directly "Flashing" a tune to the computer. You don't need any hardware yourself, nor anything to be mounted or hooked up for it to work.

Most of the tuning market (literally 85%+ for GM) now uses these software-suite style tuners in place of the old handheld flash tuners.

CRM tuning that I mentioned before is basically using a software suite (much like how HPT works) except its distributed to the tuners to read/write the data, then saved into a file, then given to the customer, then the customer flashes it. It adds steps, its a pain, and the only benefit is that you and your tuner don't have to be in the same place.*

On top of that, HP is introducing new features that better allow for live/remote tuning, and Haltech (big in the import world, made in australia) actually have complete tuning-via-wifi...which scares the hell out of me.