Congratulations! Hope you enjoy the truck.... seems like the time to be concerned is "before" you purchase
If it is stock you should just drive it a while and see how it does! They ride and drive great...
Welcome! I would start by taking some time and reading the forums.. You'll see terrible stories, but you'll also see good ones. It's no secret the EcoDiesel has it's issues, but the best you can do is learn to help extend it's life. Keep us updated and ask any questions you might have!