Diesel truck? Might be a script like that in one of the top threads...
You can put these commands into your lua code;
looks like Rotate() and MoveForward() commands-- along with keyboard input
Then see when the player is near and take control of the car.
Look into global.lua to search for those.
BTW, this is a crazy story-- has everyone heard of it?
https://www.cnn.com/videos/us/2020/05/05/utah-5-year-old-driver-orig-vstop.cnn/video/playlists/atv-trending-videos/