* Worn serpentine belt: The serpentine belt drives several components, including the power steering pump. Any wear or damage to this belt could lead to a screeching sound.
* Faulty power steering belt tensioner: This component helps keep the serpentine belt at the proper tension. If the tensioner is worn or damaged, it could cause the belt to slip and make a screeching sound.
* Air in power steering system: If air gets into the power steering system, you could hear a gurgling or whining noise.
* Worn power steering pump: If the power steering pump is worn out, it could cause a variety of problems, including screeching sounds.
If you are experiencing a screeching sound when you turn the steering wheel of your 1997 Grand Prix, it is important to have it inspected by a qualified mechanic to determine the exact cause of the problem and ensure it is resolved.