1993 Buick LeSabre Owner's Manual - Page 113

Engine Coolant Temperature Gage Malfunction Indicator Lamp (Service Engine Soon Light) SERVICE ,ENGINESOON If you have the Gage Cluster, you have a gage that shows the enginecoolant temperature. If the gage pointer moves into the red area, your engine is too hot! That reading meansthe same thing as the warning light. It means that your engine coolant has 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. HOT COOLANT CAN BURN YOU BADLY! In "Problems on the Road," this manual shows what to do. See "Engine Overheating" the Index. in SERVICE ENGINE SOON A computer monitorsoperation of your fuel, ignition and emission control systems. This light should come on when the ignition is on, but the engine is not running, as a check to show you it is working. If it does not come on at all, have fixed right away. If it stays on, orit comes it on while you are driving, the computeris indicating that you have a problem.You should take your vehicIe in for service soon. 111