1995 Buick Riviera Owner's Manual - Page 120

Door Ajar Light When the ignition is ON, this light will stay on until all the doors are closed and completely latched. Engine Oil Pressure Light This light tells you if there could be a problem with your engine oil pressure. DOOR AJAR 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. 2-63