2009 Buick LaCrosse Owner's Manual - Page 167

Low Washer Fluid Warning Light This light will come on briefly when the ignition is on. If the light stays on, a chime will sound indicating your windshield washer fluid is low. Trunk Ajar Light This light will come on and a chime will sound if the trunk is ajar and the vehicle is not in P (Park). See Windshield Washer Fluid on page 5-35 for more information. Try closing the trunk again. Never drive with the trunk open. Door Ajar Light When the ignition is on, this light will stay on until all doors are closed and completely latched. Service Vehicle Soon Light This light, comes on if a condition exists that requires the vehicle to be taken in for service. You will hear a chime if a door is unlatched after the engine is started and the vehicle is not in PARK (P). If the light comes on, see your dealer/retailer for service as soon as possible. 3-45