Do you hear the high pitch noise inside the interior or out under the hood?
Here is the procedure. It very simple in that there are very few items to remove. The hardest thing for you is disconnecting the lines from the rack and pinion. Take your time and keep your patience. Look athe diagram and you can see that the line goes all the way from the pump to the rack. Be patient and make sure the orings don't get damaged when reassembling. Also thread the fittings by hand, then tighten. You don't want to damage the threads on the rack or the pump. Good luck. If you still have noise when your done, reach out to me and I'll help you.