2000 Buick Regal groaning sound whille steerimg sharply

IT sounds as this is happening when the power steering is under higher pressure. General Motors ignorantly put the reservior between the firewall and engine on the passenger side making it difficult to check and add. Have you checked the level and condition of the fluid?

We check it with an auxilliary pressure gauge. It may not be a weak pump, but a restriction in the line.

Before I went that far, I would get the front end in the air and try moving the wheels back and forth to see if there is a binding felt. If so, pop out the two outer tie rods and try it again to see if it seems rack related or suspension related.(Ball joint, strut mount)

I apologize, For whatever reason, my email did not alert me to this. Another member just informed me.

Yes, a restriction can happen at any point in the line, thus why pressure testing may confirm this.

This is two separate paths. Suspension or steering.
Think of hydraulic versus mechanical.

Moving the rack is moving fluid through the whole power steering system. Moving the spindle shows mechanical. Ball joint. Strut mount.

After re-reading, I need to ask if the vibration you feel it in the steering wheel or brake pedal or seat?

Does the groan sound more hydraulic like ps whine? OR metal moving on rubber.

Feel free to ask and converse as long as you like. No limits. ;-)

I wouldn't think a shudder would happen from ball joints. But never say never. They are more typical of a loud whine or squeak when the go dry and not typical of this car. Shudder, as I think I understand your symptoms makes me think of a power steering problem, but have heard of these symptoms caused from tires.

It sounds pretty minor, not sure I would do much more unless it gets worse.

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