It has little or no programming capabilities on GM`s. It does come with the Jbox so you can do calibration updates and install emission related modules.

You can just connect the jbox to a PC and purchase a TIS 1 day subscription for $55 USD and flash it with their program.

 Hey Tommy, I have lived/worked in a Snappy only independent shop for the past 10 years & have found after purchasing & getting used to the different format type of the Maxisys Pro that I purchased 3 years ago that Snappy is becoming 2nd rate as far as aftermarket scan tool functionality. On going updates is awesome in comparison to 1 or 2 a year & the J-Box is the magic that allows flashing a breeze with the proper manufacturer subscriptions. Just my 2 cents.