1998 Buick Century Owner's Manual - Page 135

Engine Coolant Temperature Gage You have a gage that shows the engine coolant temperature. If the gage pointer moves into thered area, your engine is too hot! Low Coolant Warning Light If this light comes on, your system is low on coolant and the engine may overheat. See "Engine Coolant" in the Index and have your vehicle serviced as soon as you can. LOW COOLANT TEMPERATURE The light will come on briefly when your ignition is turned on to show you that it is working properly. That reading means the same thing asthe warning light. It means that your engine coolanthas overheated. If you have been operating your vehicle under normal driving conditions, you should pull off the road, stop your vehicle and turn off the engine as soon as possible. The "Problems on the Road'' section of this manual shows what to do. See"Engine Overheating" in the Index. Malfunction Indicator Lamp (Service Engine Soon Light) Your vehicle is equipped with a computer which monitors operation of the fuel, ignition and emission control systems. SERVICE SOON 2-59