High pitched wine on drivers side

Hey guys, just a quick question for ya. I get this high pitched whine with a litte vibration in the steering week when it's cold and sometimes when it's warm. I checked it out one day and it seems when I turn my wheel the high pressure power steering lines move a little bit and it sounds like the noise is coming down from the steering box area. Took it to the stealership to ask them the deal and they just said its maybe a cold steering pump but aren't sure unless try look at it. Anyone got any clue? Thanks ken