If it is the pressure line use the appropriate flare nut wrench to loosen and remove the flare fittings, then pull the old hose out and install the new hose.
The return hose often uses a hose clamp, loosen the clamp enough to remove the hose then install the new hose and tighten the clamps.
The power steering reservoir is mounted on top of the power steering pump.
The power steering lines run between the power steering pump and the rack and pinion.
How to change the power steering pump depends on which engine your car has.
Remove the belt from your 1969 Chevy power steering pump. Remove the power steering pump hoses. Remove the power steering pump retaining bolts. Reverse the process to install your new power steering pump.
Does your car have the 4 cylinder engine or the V6?
Remove the belt for am your power steering pump. Remove the power steering pump hose. Remove the power steering pump retaining bolts. Reverse the process to install your new power steering pump.
Remove the belt from your 1992 Chevy Lumina power steering pump. Remove the power steering pump hose. Remove the power steering pump retaining bolts. Reverse the process to install the new power steering pump.
The squeal is often caused by the power steering belt slipping. Check the serpentine belt to see if it needs replacement.
It depends on which engine your car has as to how to change the power steering pump. Let me know if it is the 2.5 4 cylinder or the 2.8 V6 and I will get back to you.
The 1997 Chevy Cavalier power steering hose is held in place with swivel nuts. Loosen the swivel nuts by turning them to the left. The power steering hose will come off. Reverse the process to install the new power steering hose.
Check in either a Chilton or Haynes manual. Your local library may have one if you don't have one.
Most power steering pulleys require a special tool to remove and replace. Many auto parts stores will rent you the proper tools to do the job.