1998 Pontiac Firebird Owner's Manual - Page 140
1998 Pontiac Firebird Manual
Page 140 highlights
Low Coolant Light (5.7LV8 Engine) This warning light should come on while you are starting your engine. the If light doesn't comeon, have it repaired. ~ NOTICE: Driving with the low coolant light on could cause your vehicle to overheat. See "Engine Overheating" in the Index.Your vehicle could bedamaged and it wouldn't be coveredby your warranty. Your vehicle is equipped with a low coolant indicator which is designed to detect when the coolant level drops below set limits.If the low coolant level sensor (on the radiator) dropswhile the engine is running, the low coolant indicator will light and remain lit until the ignition is turned toOFF.Check coolant level add and coolant as needed. low coolant light might stay on The OFF, after filling the radiator. Turn the ignition to then restart the engine to verify that the low coolant light goes out.See "Engine Coolant" in the Index. Malfunction Indicator Lamp (Service EngineSoon Light) SERVICE ENGINE SOON Your vehicle is equipped with a computer which monitors operationof the fuel, ignition and emission control systems. 2-85