[gmtech1]

I'm sure the work was done since warranty parts need to be turned in for the dealer to get paid for the repair. GM had seveal issues with steering shudders, and some were never resolved. Its possible the problem lies in the steering gear, since it's the only thing that was not replaced. But shudders are ususal caused by pulsations created by the pump, the replacement hoses usually had longer sections of rubber hose to help absorb the pusations and reduce the shudder.

One more thing, if the shudder only occurs when turning in one direction, then its the steering gear itself, because the pump and lines don't care what direction you are turning.