Well I got the steering gear problem fixed today, but could not have the old one because there is a $100 core charge. Not about to pay that. Could not get a pick of the internal gear part since it is sealed but had a talk with the guy who did the work. He said that there is valves in there that control the gear and that one of the valves was damaged or malfunctioning. He said that it would only be a matter of time, maybe tomorrow or the next day and I would not be able to steer the car at all. He also told me that the fluid was filthy, which surprised me since I had a flush done in Mar 2004. He flushed the entire system for me and gave me a word of warning about flushes. Some people say they flush the system but unless it is done correctly the fluid in the rack and pinion system never gets flushed out. I have test driven the car, trying to get it to do what it did before and after an hour there was no indication of lock up. Believe the problem is solved. I had the work done at a GM place and it is guaranteed, so if I have the problem again in the near future, I am covered. It steers beautifully now.
Sorry no pics.