Is it hard to change the rear whell bearings on 05

You are probably looking at about an hour per side. Brakes and backing plate must be removed. then the mounting bolts for the axle itself must be removed. this operation should be performed one side at a time in order to save the fluid inside the differential casing. It will become imperative that both oil seals are changed with the bearings. P.S. depending on the graciousness of the engineers, you may not have to remove the backing plates. Thank you, Dana