The high pressure power steering hose will commonly leak fluid; it should be replaced.Google+
Car Problem Reports
Buick Century High Pressure Power Steering Hose Can Leak Fluid
Buick Century Problem
Average Mileage: 174,412 mi (89,000 mi - 298,650 mi)
Visitor, 2002 Buick Century, 150,000 mi
Thing burst while i was driving down the road. Really sucked.
Visitor, 1996 Buick Century, 160,000 mi
steering quit and after filling reservoir, I found all the fluid on the floorboard.
Visitor, 1998 Buick Century, 298,650 mi
Leaking power steerinng line
Visitor, 2001 Buick Century
Dealing with this issue now.
Visitor, 1990 Buick Century
replaced hose unit