The high pressure power steering hose will commonly leak fluid; it should be replaced.Google+
Car Problem Reports
Buick LaCrosse High Pressure Power Steering Hose Can Leak Fluid
Buick LaCrosse Problem
Average Mileage: 73,778 mi (46,000 mi - 93,450 mi)
Visitor, 2007 Buick LaCrosse, 93,450 mi
It is leaking, will order parts and fix it myself
Visitor, 2008 Buick LaCrosse, 90,000 mi
The car makes a whining noise and dark fluid dripped under car. The dealer says the leak is coming from the steering pump and steering gear (rack & pinon) and both need to be replaced: steering pump & plastic reservoir ($576), steering pump only ($376), but reservoir often breaks during repair, steering gear with alignment ($924), plus $52 to diagnosis ($1550 total). price includes tax & mr goodwrench multi-point vehicle inspection.
The hi-pressure PS hose was replaced @ 87000 miles due to seepage- not really a leak. Two qts of PS fluid was added. About 600-700 highway miles later, while maneuvering into a parking area the PS completely failed. I checked fluid level-which was OK. Left it overnite and in the morn checked for leaks under the car and fluid level in the pump- all OK. Started car and drove off as tho nothing was wrong- PS was working fine and still is @ 6000 miles later. Have checked w/ 2 Buick dealers and several auto repair shops- all totally baffled. This is a real mystery.
Visitor, 2008 Buick LaCrosse, 80,000 mi
Same thing.. It has a protective hose on it that cause water to collect and rust out the line
Visitor, 2008 Buick LaCrosse, 46,000 mi
The high pressure power steering hose leak fluid. We rreplacing the hose.
power steering leak high pressure hose at pump, New hose leaks needs another part or new pump.