I have a 2001 trans am and i'm still using the normal OS : 12202088

my VIN # is 2G2FV22G312135527

on page 3/4 of the tutorial it is talking about finding EFILives custom OS that matches "your" PCM's current OS....

now i see it describes 01 02 and 03.. but on page 4 i see my number
12202088 and 012500xx for the EFILive custom OS

how/where or what is this number and where can i find it? lol.

I downloaded the custom OS for 2001 from the download page here. what is this 012500xx number?