HP Tuners MPVI 3 is a device/software suite that allows you to read and write your ECM/TCM. This interface connects to the cars computer(s) to a laptop that can read/write the computer file. This will still require someone that knows how to adjust the tables correctly without damaging your engine and/or transmission.
*HP Tuners Credits: To be able to "license" your vehicle it will require a specific amount of credits ONE time (once an ECM is licensed you never have to license again if linked to your HP device). Each vehicle is different, it ranges from 2-10+ depending on the year, make, model, ecu's and trans etc....