Dumb Question - Cigarette Lighter Fuse?

[Zilverado]

So I blew the fuse on my cig lighter plug the other day (it's the kind that is inside the ashtray). I was looking for the fuse and could not find one in the fuse block - although I did not pull every single one out.

Should the fuse be in the fuse block or is it in-line somewhere. Also, the plug is wired to be hot all the time - ignition "on" or "off". I like that, but is this stock? If not I guess I should be looking for an in-line fuse.

So, sorry for the silly question, but I thouht I might be able to trace it quickly this way. Thanks.