1993 Cadillac DeVille Owner's Manual - Page 250

If No Steam Is Coming From Your Engine: If you get the overheat warning but see or hear no steam, the problem may not be tooserious. Sometimes the engine can get a little hot too when you: Climb a long hill on a hot day. Stop after high speed driving. 0 Idle for long periods in traffic. 0 Tow a trailer. If you get the overheatwarning with no sign of steam, try this for a minute or so: 1. Turn off your air conditioner. 2. Turn on your heater to full hot at the highest fan speed and open the window as necessary. 3. If you're in a traffic jam, shift to "N"(Neutral). If you no longer have the overheatwarning, you can drive. Just tobe safe, drive slower for about ten minutes. If the warning doesn't come back on, you can drive normally. If the warning continues, pull over, stop,and park your vehicle right away. If there's still no sign of steam, you can idle the engine for two or three minutes while you're parked, to see if the warning stops. But then, if you still have the warning, TURN OFF THE ENGINE AND GET EVERYONE OUT OF THE VEHICLE until it cools down. You may decide not tolift the hood but get service help right away. to . 237