2001 Pontiac Bonneville Owner's Manual - Page 146

To prevent engine overheating, the air conditioning compressor will turn off automatically just prior to the gage pointer entering the red area. As the engine cools down, the air conditioning compressor will automatically turn back on. On vehicles equipped with the DIC, the message ENGINE HOT...A/C DISABLED will appear in the DIC display and a warning chime will sound. If the gage pointer moves into the red 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" in the Index for more information. The section "Problems on the Road," in this manual explains what to do if your engine overheats. See "Engine Overheating" in the Index. Tire Pressure Light (If Equipped) The check tire pressure system can alert you to a large change in the pressure of one tire. After the system has been properly calibrated, the TIRE PRESS light will come on if a pressure difference (low pressure) is detected in one tire. The light will stay on until you turn off the ignition or reset (calibrate) the system. See "Check Tire Pressure System" in the Index. The TIRE PRESS light also comes on briefly when you turn your ignition key to START. If the light doesn't come on then, have it fixed so it will be there to tell you if the pressure in a tire is low. If the anti-lock brake system warning light comes on, the check tire pressure system may not be working properly. See your dealer for service. Also, see "Anti-Lock Brake System Warning Light" in the Index. 2-79