2005 Pontiac Bonneville Owner's Manual - Page 158

Engine Coolant Temperature Gage (V8 Engine) If the gage pointer moves into the shaded area, your engine is too hot. On vehicles equipped with the systems monitor, the CHECK GAGES light will come on and a warning chime will sound. On vehicles with a DIC, a CHECK GAGES TEMPERATURE message will be displayed and a warning chime will sound. See DIC Warnings and Messages on page 3-62 for more information. On vehicles with a V8 engine, if the coolant temperature is above normal operating range, the message ENGINE HOT...IDLE ENGINE will appear. This means that you should reduce the engine load and speed to prevent the engine from overheating. If an engine overheat condition exists, the message ENGINE HOT...STOP ENGINE will appear. This means that you should pull off the road, stop your vehicle, and turn off the engine as soon as possible. See Engine Overheating (3.8L V6 Engine) on page 5-36 or Engine Overheating (4.6L V8 Engine) on page 5-38, for information on what to do if your engine overheats. Your vehicle is equipped with an Overheated Engine Protection Operating Mode, which alternates firing groups of cylinders to help prevent engine damage. See "Overheated Engine Protection Operating Mode" under Engine Overheating (3.8L V6 Engine) on page 5-36 or Engine Overheating (4.6L V8 Engine) on page 5-38 for more information. United States Canada This gage shows the engine coolant temperature. To prevent engine overheating, the air conditioning compressor will turn off automatically just prior to the gage pointer entering the shaded area. As the engine cools down, the air conditioning compressor will automatically turn back on. On vehicles equipped with the Driver Information Center (DIC), the message ENGINE HOT...A/C DISABLED will appear on the DIC display and a warning chime will sound. 3-46