idle overspeed/ underspeed gen 4 L96??

i have been tuning for not too too long and dont consider myself an expert by any means however i am trying to learn as much as i can about doing this the right way, with that said ive tuned a few cars nothing crazy mostly dealing with gm LS platform ; one of my friends was interested in the ghost cam tune at idle (disgusting i know) and i watched the tutorial from HP academy and it went smooth and he loved it; recently another friend of mine wanted his truck tuned 2015 silverado 2500 6.0 and he also asked about ghost cam; ive double checked my parameter templates and everywhere else i can think of for idle over speed and underspeed tables and i cant find anywhere; i was just wondering if there is a different way doing it with this platform ? any help is greatly appreciated thank you!