2007 GMC Acadia Owner's Manual - Page 225

Engine Coolant Temperature Gage Tire Pressure Light This light comes on briefly when you turn the ignition to ON. United States Canada This gage shows the engine coolant temperature. Under normal driving conditions the gage will read 210°F (100 °C) or less. If the gage pointer is near 260°F (125 °C), the engine is too hot. It means that your engine coolant has overheated. If you have been operating your vehicle under normal driving conditions, you should pull off the road, stop your vehicle and turn off the engine as soon as possible. See Engine Overheating on page 410 for more information. It will also come on when one or more of your tires are significantly underinflated. A CHECK TIRE PRESSURE Driver Information Center (DIC) message will accompany the light. See DIC Warnings and Messages on page 244 for more information. Stop and check your tires as soon as it is safe to do so. If underinflated, inflate to the proper pressure. See Tires on page 435 for more information. This light will flash for about 70 seconds and then stay on if a problem is detected with the Tire Pressure Monitor system. See Tire Pressure Monitor System on page 444 for more information. 225