hello how is everyone i have 2020 sierra 5.3 with global a ecu i am trying to tune the cutoff on P/N to reach 6,000 rpm but what is happeing is after i edit my cutoff and test the car on manual shifting it reaches 6,000rpm and start bouncing off the revlimiter fast but when in P or N it will only reach 4,000 and stay there not like 2017 gmc what is does on manual shifting is the same on p/n what tables need to be edited please