Oh i see, it is because i'm scared of using Mods on my Steam version of the Game, so i download a Reloaded one, some friends said i might get banned from Steam if i use mods.

Hello guys, i'm having a issue trying to summon the following cars > Pfistiser 811 EmperorETR1 Annis RE-7B Progen Tyrus Grotti X80 Proto.
I'm using a Reloaded Version of GTA V, updated to the V1.36.

Using the Simple Trainer as well. I would like to know what is happenning, i would really love to test these cars out, but i summon them, then 1 sec after i summoned them, they simply vanish into the oblivion. What is going on? Thanks.