This is an AC Delco alternator I installed on my truck while out of town when mine failed. When I got home, I had the original alternator rebuilt and decided to reinstall that one since it was the original. So now I've got this nearly new alternator I don't need. It is a very good quality part and has maybe a few hundred miles on it. It's basically new with the original box. I paid $230 for it, including the core charge to keep my original. That's pretty-much what a name-brand alternator for these trucks will cost (including the core charge. Feel free to ask any questions, and I'm willing to email more pictures if someone would like.