Installation:

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

2: Extract the "A343_sign_7.dds" file

3: Using OpenIV with Edit Mode enabled, add it to "D:\SteamLibrary\steamapps\common\Grand Theft Auto V\mods\update\x64\dlcpacks\civil\dlc.rpf\x64\levels\gta5\vehicles\civilvehicles.rpf\a343.ytd"