I have Impala 2014 with a 6T70 transmission, I have been researching how to exactly tune to change the shifting it feels sluggish when in auto, if i drive in manual it pulls through the gears without hesitation, Ive seen some tunes from other vehicles with the same trans. Would following the changes done on those work since it has the same trans? Total newbie, Just trying to figure out where to get started.. Thanks