My brother has an Avalanche and has a leaking rear axle seal from what he was told by the shop he was getting repairs done at. They said they could change it for $220 but I figured I'd check around on boards to find out how hard it would be to do the job ourselves. Anyone know how hard it would be and have a diagram of the axle set up. Is the seal near the housing or at the end of the axle tube? I have done a little work but never on Chevy's just my Jeep.