The high pressure power steering hose will commonly leak fluid; it should be replaced.Google+
Car Problem Reports
Buick LeSabre High Pressure Power Steering Hose Can Leak Fluid
Buick LeSabre Problem
Visitor, 1998 Buick LeSabre, 120,000 mi
The power steering hose is leaking. Don't know for sure which the return line or the other, but it is leaking bad. My son is coming over & pulling it apart to find & fix the hose. We have an Chilton manuel, but cannot find any drawings of the power steering hose & how to remove or replace it, so I am trying the web.