Power steering fluid

My Blazer, bought a few months ago, had major power steering fluid leak. I replaced the power steering pump. I replaced the o-rings where the high side connects to the pump. Still leaking, replaced the high pressure side hose and o-rings on both ends. Did see leaking where the high side pressure hose connects to steering gear box. Non-existent after replacement. Was fine for a week, now its leaking again. Know its power steering fluid as the pump reservoir is gradually emptying, clear fluid on driveway. Haven't stuck my head under the Blazer. Is this a common problem?