Installation:
1: Install this mod:
https://www.gta5-mods.com/vehicles/aircrafts-passenger-cargo-pack-add-on

2: Using OpenIV, add the "779X_sign_10.dds" file to "E:\SteamLibrary\steamapps\common\Grand Theft Auto V\mods\update\x64\dlcpacks\civil\dlc.rpf\x64\levels\gta5\vehicles\civilvehicles.rpf\"