1999 Buick Riviera Owner's Manual - Page 139

yellowblue Oil Pressure Light This light tells you if there could be a problem with your engine oil pressure. NOTICE: Damage to your engine from neglected oil problems can be costly and is not covered by your warranty. Check Oil Level Light When this light comes on and stays on, it means oil isn't going through your engine properly. You could be low on oil, or you might have some other oil problem. The CHECK OIL LEVEL light is lit for two to four seconds as a bulb check each time the ignition key is turned to RUN. CAUTION: Don't keep driving if the oil pressure is low. If you do, your engine can become so hot that it catches fire. You or others could be burned. Check your oil as soon as possible and have your vehicle serviced. If the light doesn't come on, have your vehicle serviced. If the engine oil is more than 1 qt. (0.95 L) low, this light will turn on for about one minute and then will remain off until the next time you start the vehicle only if the vehicle has been shut off for at least eight minutes. If the CHECK OIL LEVEL light comes back on, the engine oil should be checked at the dipstick then brought up to the proper level if necessary. See "Engine Oil" in the Index. 2-77