Installation:

1: Install one or both of these mods:
https://www.gta5-mods.com/vehicles/sandkingxxxl-add-on
https://www.gta5-mods.com/vehicles/lssd-sandkingxl-add-on

2: Extract the "sandkingxl_sign_6.dds" texture

3: Add it to the "sheriff7.ytd" file and "sandkingxxxl.ytd" files

Credit for the Sandking XXXL vehicles goes to legionarius