Tuning a 5.3 06 Sierra that has been swapped to a 6.0. Got a donor stock file with matching OS & copied over all the 6.0 values EXCEPT the desired throttle area because I was scared of bricking the PCM. The truck is going on cruise at idle while driving & is pushing through the converter in drive. The trucks only mods are LT headers, a CAI, & 3200 stall converter so I wouldn't think idle tuning would be a big deal unless I need to change the desired throttle area to the 6.0 values. Any advice?