Grand Theft Auto V/mods/x64e.rpf/levels/gta5/vehicles.rpf
Changing the number is carried out using the Menyoo trainer or any other trainer that has such an option.
Attention: If the license plate has not been replaced, then open “OpenIV” and perform a global search for the “vehshare.ytd” file. Next, replace all files named “vehshare.ytd” with new ones! Don't forget to save the original files before installation!