1997 Pontiac Bonneville Owner's Manual - Page 266

Supercharged Engine (Option) Your Bonneville may have a 3800 Supercharged engine. The supercharger is a device which is designed to pump more air into the engine than it would normally use. This air mixed with fuel, creates increased engine power. Since the supercharger is a pump andis driven from an engine accessory drive belt, increased pressure is available in all driving conditions. The Powertrain Control Module (PCM) works with a vacuum control to regulate the increased pressure required during specific driving conditions. When this increased pressure or boost is not desired, such as during idling and light throttle cruising, the excess air that the supercharger is pumping is routed through a bypass. AI1 of these controls working together provide high performance character and fuel efficiency in the 3800 V6 Supercharged engine. Engine Oil If the CHECK OIL LEVEL light on the instrument panel comes on, it means you need oil to check your engine level right away. For more information, see "Check Oil Level Light''in the Index. You should check your engine oil level regularly; this is an added rerninder. CHECK OIL LEVEL It's a goodidea to check your engine oil every time you get fuel. In order to get an accurate reading, the oil must be warm and the vehicle must be on levelground. 6-13