2004 Cadillac DeVille Owner's Manual - Page 178

This gage shows the engine coolant temperature. If the gage pointer moves into the shaded area, the engine is too hot. Malfunction Indicator Lamp Service Engine Soon Light in the United States or Check Engine Light in Canada Digital Cluster That reading means the same thing as the warning light - the engine coolant has overheated. See Engine Overheating on page 5-29. . United States Canada (Analog Only) Your vehicle is equipped with a computer which monitors operation of the fuel, ignition and emission control systems. 3-52