2007 Hummer H3 Owner's Manual - Page 185

Engine Coolant Temperature Gage Tire Pressure Light This light should come on briefly when you turn the ignition to ON. United States Canada This gage shows the engine coolant temperature. If the gage pointer is in the shaded area of the gage, 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 338 for more information. This light will also come on when one or more of your tires are significantly underinflated. A LOW TIRE message will also appear in the Driver Information Center (DIC), see DIC Warnings and Messages on page 196 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 367 for more information. This light will flash for 60 seconds and then turn on solid if a problem is detected with the Tire Pressure Monitor system. See Tire Pressure Monitor System on page 376 for more information. 185