1998 Oldsmobile Achieva Owner's Manual - Page 204

If No Steam Is Coming From Your Engine If you get the overheat warning but see or hear no steam, theproblem may not be too serious.Sometimes the engine can get little too hot a when you: Climb a long hill on a hot day. Stop after high-speed driving. Idle for long periods in traffic. Tow a trailer. If you no longer have the overheat warning, you can drive. Justto be safe, drive slower for about minutes. 10 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 seeif the warning stops. But then, if you still have the warning, turn oathe engine and get everyone out of the vehicle until it coolsdown. You may decide not to lift thehood but to getservice help right away. If you get the overheat warning 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 the highest fan at speed and open the window as necessary. 3. If you're in a traffic jam, shift toNEUTRAL (N); otherwise, shift to the highest gear while driving -- AUTOMATIC OVERDRIVE (@) or DRIVE (D). 5-16