After letting the rear end leak for months, I finally broke my golden rule of not wrenching on my daily driver, and I decided to replace the seals myself. I pulled off one axle tonight. Taking my time it was about 1.5 hours. Here's a sneak preview:
Over the next few days I'll post up a complete step-by-step tutorial, based on the exact steps from the GM service manual. I took about 30 pictures tonight, and I'll probably have about the same number for re-assembly.