Found this in the driveway. It looks like a solid rubber bushing of some sort. It has an outside diameter of 2 1/4", inside diameter of 1", and a width of 1 1/4".
Check your body mounts, and in general any place that ties two pieces of steel together, including engine, trans, transfer case, and suspension mounts. It does look pretty new though.
1" ID sounds kinda big for a body mount. Sounds big for a shock mount too. Have you had work done lately? Or any company with a lift kit on thier truck?