2005 Pontiac Bonneville Owner's Manual - Page 299

Notice: If your engine catches fire because you keep driving with no coolant, your vehicle can be badly damaged. The costly repairs would not be covered by your warranty. See Overheated Engine Protection Operating Mode (4.6L V8 Engine) on page 5-40 for information on driving to a safe place in an emergency. If you get the overheat warning 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 safe to do so, pull off the road, shift to PARK (P) or NEUTRAL (N) and let the engine idle. 2. Set the climate controls to the highest heat setting and fan speed and open the windows as necessary. If you no longer have the overheat warning, you can drive. Just to be safe, drive slower for about 10 minutes. If the warning does not come back on, you can drive normally. If the warning continues, pull over, stop, and park your vehicle right away. If there is still no sign of steam, idle the engine for three minutes while you are parked. If you still have the warning, turn off the engine and get everyone out of the vehicle until it cools down. Also, see "Overheated Engine Protection Operating Mode" later in this section. You may decide not to lift the hood but to get service help right away. If No Steam Is Coming From Your Engine An overheat warning, along with a low coolant message, can indicate a serious problem. See DIC Warnings and Messages on page 3-62. If you get an engine overheat warning with no low coolant message, but see or hear no steam, the problem may not be too serious. Sometimes the engine can get a little too hot when you: • Climb a long hill on a hot day. • Stop after high-speed driving. • Idle for long periods in traffic. 5-39