I figured it was pretty rare to have one. I think I might put it on to be different than everyone else. It's not in perfect shape but it's fixable. After it's been cut I can drain oil without removing it (dual sump oil pan). It should keep water and mud from being splashed on to the front of the engine.
Here's a picture of it:

Here's another thing that seems to disappear on these trucks. The fender splash guards:

My first truck was missing both, second truck had driver side and third truck had the passenger side.