my left rear wheel has up an down side to side play in it...the bearings are bad...anybody have any pics, vids or a how to change these

 

Mine has the same along with a whine above 30mph under accel. It may be unrelated though. I've read that these axles have a little slop in the wheels because of the C-clips. Anyone else agree with this?

 

C-clip slop is in and out. If the axle will move up and down, and such, the bearing is toast, and it is time for a new one. Driving it like that is just asking for a much more expensive repair.... if not a totaled truck.

Bearings are cheap. Trucks are not.

 

Download the 2001 FSM from the FAQ/DIY section.