1997 Buick Riviera Owner's Manual - Page 140

Check Oil Level Light The CHECK OIL LEVEL light is lit for two to four seconds as a bulb check each t h e the ignition keyis turned toRUN. If the light doesn't come on, have your vehicle serviced. Door Ajar Light When the ignition 1s on, this light will stay on until both doors are closed and completely latched. CHECK OIL LEVEL DOOR AJAR If the engineoil is more thanone quart (0.95 L) low, this light will turn on for about one minute and then will remain off until the next time youstart the vehicle only if the vehicle has been shut for at leasteight minutes. off If the CHECK OIL LEVEL light comes back on, the engine oil should be checked at dipstick then the brought up tothe proper level if necessary. "Engine See Oil" in the Index.