Oh, for crissakes. What a bunch of children!
I never said anything personal about GMJunkie, I just said that the idea that you can repair a binding or inconsistent power assist with a pour-in additive is a ridiculous idea.
I realize that GMJunkie has quite a flock here on the CAC and might be one of the best service techs active on this site, but that still doesn't negate the fact that, based on the symptoms listed in the first post, pouring in some Lucas concotion is not going to repair that power steering.
As for Lucas Oil....man...you talk about a product that is well-marketed and over-hyped. For gosh sakes, people, if you are using the correct lubricants or fluids and you properly maintain the systems in which they are in, you don't need pour-in additives, Lucas or otherwise.
If you want to read more about the effectiveness of such products, take a look at the "Bob is the Oil Guy" site. I'll admit the name is silly, but that web site is one of the better resources on the web about engine oils and other lubricants. Specfically, see this page covering Lucas "Oil Heavy Duty Oil Stabilizer":
http://www.bobistheoilguy.com/images/lucas/lucas.htm
The idea that Lucas uses the term "Stablizer" in the brand name is hilarous.
I wouldn't add Lucas to the lubricants or fluids in any car I own.