2001 Cadillac Catera Owner's Manual - Page 144

Engine Coolant Temperature Warning Light This light tells you that the engine has overheated. If this light comes on, you should stop the vehicle and turn the engine off as soon as possible. A warning chime should also sound if this light comes on. As a check, the light should come on for a few seconds when you start the engine. See "Engine Overheating" in the Index. Engine Coolant Temperature Gage This gage shows the engine coolant temperature. If the gage pointer moves into the red area, the engine is too hot! This reading means the same thing as the warning light -- the engine coolant has overheated. You should stop the car and turn the engine off as soon as possible. See "Engine Overheating" in the Index. 2-77