Vizion - If you have any mechanical ability, you can do this job yourself and save a ton. I don't want to steer you into trouble, but I just did mine a week ago and it was a piece of cake. I did both of my fronts, took my time and stopped for a cup of coffee, and finished in 1 hr 15 min. This job is very straightforward and doesn't require any trickery, magic or special tools. I can fiil you in if you're interested, but there are many informative posts on the subject here on this board.
If you're interested in doing this yourself, check out GMPartsdirect.com. Search for your year and "Hub assembly". I think for the '96 they are around $160+*&H. ...AND genuine GM Parts!
Markwb is correct about the cost at dealer. May be more depending on your part of the country.