To find it:
1. Open the hood: Locate the hood release lever (usually inside the car, near the steering column or under the dashboard).
2. Look around the engine: The reservoir is most likely near the power steering pump, which is usually attached to the engine. It will be a relatively easily accessible container.
3. Look for markings: The reservoir will likely be labeled "Power Steering Fluid" or have a symbol indicating power steering.
If you can't find it visually, consult your owner's manual. It will have a diagram showing the location of all fluid reservoirs. You can also search online for "1998 Buick Regal power steering fluid reservoir location" along with images. Seeing pictures will significantly help you locate it.