1. Locate the engine: Open the hood and identify the engine. It's usually towards the front of the vehicle.
2. Remove the plastic engine cover: There are usually clips holding this cover in place. Carefully remove them to access the spark plug wires and spark plugs. You may need a screwdriver or similar tool for some clips.
3. Find the spark plug wires: These wires run from the spark plugs to the distributor cap (if it has one) or directly to the ignition coils (more likely on a 1997 Skylark). Follow these wires down to locate the plugs themselves. They are usually relatively easy to spot nestled amongst the valve cover and engine components.
Important Note: The exact position will slightly vary depending on which engine (2.4L or 3.1L) your 1997 Buick Skylark has. Consult a repair manual specific to your vehicle's engine for precise diagrams and instructions. A Haynes or Chilton repair manual is a good investment for car maintenance. Using a repair manual is highly recommended, to avoid damage to your engine or injury to yourself.