Where can I find the name of the vehicle file?You can add any car to your garage using cheats. Add a new entry or edit existing one that gives vehicle, type your car's file name and a variant and done
truck_2dr_pickup02 in misc_tables.vpp_pc. truck_2dr_pickup02.xtbl file contains names of variants
Sorry I'm writing here again, but how do I add it to the color slot? I saw a mod a person with the nickname Burn the Witch, but there are too many other colors, and I only need one"Gang Saints Purple" in vehicle_cust_color_pool.xtbl