1993 Pontiac Bonneville Owner's Manual - Page 112

Boost Gage (OPTION) Vehicles equipped with the supercharged engine have this boost gage that indicates vacuum during light to moderate throttle and boost under heavier throttle. The gage displays the air pressure level in psi going into the engine's combustion chamber. The gage is automatically centered at zero psi every time the engine is started. Actual vacuum or boost is displayed from this zero point. Changes in ambient pressure, such as drivingin mountains and changing weather, will slightly changethe zero reading. I rn Driver ZnformationCenter WASHER FLUID: This message means your washer fluid tank is less than 30% full. The windshield portion of the vehicle outline will also glow. If these come on, see the Index under Windshield WasherFluid. LOW COOLANT This message means your coolant level has fallento about half full. If it comes on, see the Index under Engine Coolant. CHECK GAGES: If this light comes on and stays on whileyou are driving, check your gages for fuel, coolant temperature, oil pressure or battery voltage. If you have the Driver Information Center, it gives you important safety and maintenance facts. When you turn the ignition on, the entire Center lightsup for a few seconds. Then it goes to work. FUNCTION MONITOR: This lets you know if you are low on fluids or have a problem with a vehicle function: CHECK OIL LEVEL: This message could mean your oil level is low. If it comes on for more than three seconds, see the Index under Check Oil Level Warning Light. 111