2007 Chevrolet Tahoe Owner's Manual - Page 220

Entry Lighting Your vehicle has an illuminated entry feature. When the doors are opened, the dome lamps will come on if the dome override button is in the extended position. If the dome override button is pressed in, the lamps will not come on. Your vehicle may also have reading lamps in other locations. To turn the lamps on or off, press the button located next to the lamp. The lamps are fixed and cannot be adjusted. Electric Power Management The vehicle has Electric Power Management (EPM) that estimates the battery's temperature and state of charge. It then adjusts the voltage for best performance and extended life of the battery. When the battery's state of charge is low, the voltage is raised slightly to quickly put the charge back in. When the state of charge is high, the voltage is lowered slightly to prevent overcharging. If the vehicle has a voltmeter gage or voltage display on the Driver Information Center (DIC), you may see the voltage move up or down. This is normal. If there is a problem, an alert will be displayed. Exit Lighting With exit lighting, the interior lamps will come on when the key is removed from the ignition. They will turn off automatically in 20 seconds. The lights will not come on if the dome override button is pressed in. Reading Lamps If your vehicle has reading lamps they are located on the overhead console. To turn on the reading lamps, press the button located next to each lamp. To turn them off, press the button again. 220