2003 GMC Safari Owner's Manual - Page 155

Engine Coolant Temperature Gage This gage shows the engine coolant temperature. If the gage pointer moves to the red area, your engine is too hot! Malfunction Indicator Lamp Service Engine Soon Light in the United States or Check Engine Light in Canada SERVICE ENGINE SOON I CHECK Canada 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 United States vehicle and turn off the engine as soon as possible. See Engine Overheating on page 5-31. Your vehicle is equipped with a computer which monitors operation of the fuel, ignition and emission control systems. 3-30