2004 Buick Regal Owner's Manual - Page 239

If No Steam Is Coming From Your Engine An overheated engine warning can indicate a serious problem. See Engine Coolant Temperature Warning Light on page 3-34. If there is an overheated engine warning, and no steam is seen or heard, the problem may not be too serious. Sometimes the engine can get a little too hot when the vehicles: If the overheated engine warnings no longer exist, the vehicle can be driven. Just to be safe, drive slower for about 10 minutes. If the warning does not come back on, continue to drive. If the warning continues, and you have not stopped, pull over, stop, and park the vehicle right away. If there is still no sign of steam, idle the engine for three minutes while parked. If the warning still exists, turn off the engine and get everyone out of the vehicle until it cools down. Also, see "Overheated Engine Protection Operating Mode" listed previously in this section. You may decide not to lift the hood but to get service help right away. Climbs a long hill on a hot day. Stops after high-speed driving. Idles for long periods in traffic. Tows a trailer. If the overheated engine warning appears with no sign of steam, try this for a minute or so: 1. In heavy traffic, let the engine idle in NEUTRAL (N) while stopped. If it is safe to do so, pull off the road, shift to PARK (P) or NEUTRAL (N) and let the engine idle. 2. Adjust the heater to the highest temperature and fan speed settings and open the window as necessary. 5-31