Turned out to be 2 simple things...
For one, one nut on my steering damper was loose. I put a lock nut and some threadlock on and that should take care of that.
Second, apparently, a couple of years ago when I put the suburban 3:73 axles in and I had decided to replace worn tie rod ends on the drag link while I was under there, I didn't get the castle nut on the steering arm end tight enough. No idea why it all of the sudden decided, to pop loose after all this time, but it did.
I took juanprado's advice and parked it until I could get under it (yesterday). I wish I would have taken pics, but it's gotten chilly here as of late (5° this AM) and I didn't feel like taking the time. Anyway, there was a good 1/8" of play and getting the castle nut off was a bear.
I took a good C-clamp and tightened the tie rod end down into the steering arm as best I could, the idea being Tom it in there enough so it wouldn't turn with the nut. After I got it loose, I wire brushed and lubed the threads on the nut and tie rod end and put them back together. This time I got it tight!
Thanks for all of the help and suggestions, guys. Even though it was something else, I've printed the page for a future troubleshooting reference to go in my binder.