Ok i have neen trying dor days and cant get this autocal to full flash my lly it will read codes but when i try to flash it i get a failure to communicate code and if i try to go to the bbx and auto find the ecm it will only pick up the trans so i wiped everything off my auto cal and try to reload the stc and pic needed then passthrough flash with the lap top and it say license is not valid. And when i try to crank the truck i got nothin. Sorry for the long read please help i am stumped and so is my vendor