I have a 2006 ,6.0 truck motor and 4L80E, the computer is a 99 chevy truck 5.3 LM7 . the harness has been modified and computer flashed (from a business no longer in business). I currently do not have any signal from computer to injectors or coils (gounds at computer test correctly and cam and crank signals live scope correctly at the computer ).During the first attempt at startup it had spark for two seconds then none after resetting power to the computer it had spark for two seconds again (now nothing). Besides these issues, do you think this computer and harness (having only the two plugs for the trans. will work the trans properly )? Maybe im wasting my time with this setup ?