Let’s just be clear here for the sake of others. If the item is in the Livingworld config, it will show up. But if it can’t find the script, it won’t do anything. But, I’ll assume you checked the paths to your scripts in your services file and fixed those paths as I noted above.
IOW, I was getting all the fuel trucks I was asking for, but kept getting told no trucks were available until I fixed the path to the script in the Services.xml file.