doubt it's bearings...
there are some bolts that hold the tilt mechanism on.. pretty good for coming loose..
this is about as deep in a steering column as you're gonna get..
it's not really all that difficult, but it is time consuming, as you have to think your way through a couple spots..
(if you have a digital camera, take LOTS of pictures)
you're going to need a pivot pin puller as well as a puller for the steering wheel.
those bolts are also a special "tighten down 'til the heads snap off" variety... be prepared to down the truck a couple days while the dealer (only source I'm aware of) orders them in