I was wondering how hard it is to change the passenger side front axle seal, because mine has a small leak. Its on my 02 silverado 4x4 with the 5.3L.

 

Pretty tuff..

getting the axl;e out will require sway-bar link removal,and a special sized socket for the axle nut.
Then you must remove that whole alluminum tube housing with the shaft in it,and tear it down on the bench to get the 2-foot shaft out.Then replace the seal.

In other words...look where your leak is...the rf axle bolts to a flange...that flange has a 2-foot shaft in a housing...that whole housing must be removed.