[DRIFT_HUNTER]

pawn Код:

public FixAllCar()
{
    for(new playerid = 0; playerid < MAX_PLAYERS; playerid++)
    {
        if(IsPlayerVipType(playerid,3))
        {
            if(IsPlayerConnected(playerid) && IsPlayerInAnyVehicle(playerid))
            {
               new vehicleid = GetPlayerVehicleID(playerid);// gettin the vehicle id
                SetVehicleHealth(vehicleid,1000.0);// set the vehicle healt
            }
        }
    }
    return 1;//You dont need it but you can use it
}

You forgot one } and you dont need return but you can use it
[EDIT]I late