[Rdx]

First you need to get arguments for createvehicle (model, color, positions)

cache_get_field_content(i, "vehicleModelID", result);
new tmp_model = strval(result);

vid = CreateVehicle(tmp_model...

After this you can add values to array.

vehStat[vid][value] = ...

By the way, why you using cache like that?
Better way:

new tmp_model = cache_get_field_content_int(row, "vehicleModelID");