I need to bleed air from power steering line/rack on a 1999 sts caadillac

did you bleed the air out of the power steering lines -
Getting Air Out of the Power Steering Pump and Lines how to bleed air out of power steering lines Yahoo Video Search Results also if you didnt properly set tie rods or have alignment done your wheels wont be rolling straight and can cause wobble

Never known a vehicle to need bleeding of the power steering system - it's self bleeding because it is an open fluid circuit.
BUT - you can make sure you get all the air out of the rack simply by cycling the steering wheels all the way to the right until you hear the pump groan, then all the way to the left, then back and forth a few more times. If there is any air in the steering rack, this should force it out.

Never known a vehicle to need bleeding of the power steering system - it's self bleeding because it is an open fluid circuit.
BUT - you can make sure you get all the air out of the rack simply by cycling the steering wheels all the way to the right until you hear the pump groan, then all the way to the left, then back and forth a few more times. If there is any air in the steering rack, this should force it out.

Sounds like an air bubble in there. You need to bleed them.

the bleeding screw always located in a upper portion of gearbox or rack n pinion

you need to bleed the rack. you can try to turn the steering wheel to the left and hold for 5 sec and then to the right and hold, continue this a few times check fluid and repeat. you can also try to loosen line on rack and turn wheel to bleed air out then tighten before turning wheel again.

hi from uk if you are referring to power steering ? you do not bleed as you do brakes you preferably rais front wheels off ground then ensure vehicle supported then with engine running and the p/steer reservoir kept to full turn the steering from left to right fully for a few times this ensures any air in system is expelled from rack and hydraulic lines back to reservoir and out keep oil level check so level does not fall low as to air induction into system then lower car and check p/steer operation hope this helps ps make final check for any leaks for a couple of days as a precaution ?

if its been a week, there should no tbe any air. if its heavy, the rack could be bad, or weak pump????? any noises? air will usually cause a whiney noise, and there will be air whipped, foamy fluid in the pump. A pump pressure regulator could be stuck open, not allowing full pressure? I would have a shop diagnose it, tell them the history and see if they can find a cause.

If the rack is accessible you could try to bleed the rack lines to get fresh fluid to the rack. Sometimes this helps. If not accessible or bleeding doesn't help Yes the rack is due for replacement.

if you replacing only lines for power steering you dont have to take out the belt but on other side of linens are very hard to disconnect from the rack and pinion...
you have to lift and secure the front disconnect the lines from pump and fallow he lines and keep disconect the holders from the body when you rich the end you are right under the driver seat you will see the very little open space and you see the bolt that connects linen to rack and pinion you will need long wrench take it out..just take your time ..when placing the new line just make sure it seats good on place and you gonna need the bleed power steering system after changing the lines...
so finally this job is really hard to do if you don't have experience i recommended to you just bring somebody know what he's doing for save time and not to do some job double time.Power steering system is closed system air or heavy leaks can damage your expensive power steering pump and rack and pinion.