2007 Buick LaCrosse Owner's Manual - Page 163

Perimeter Lighting Perimeter lighting provides a period of exterior vehicle lighting. Perimeter lighting activates when the key is removed from the ignition or the vehicle is unlocked using the Remote Keyless Entry (RKE) transmitter. The amount of time the exterior lamps will remain on can be programmed using the Driver Information Center (DIC). See "EXIT LIGHT DELAY" under DIC Vehicle Personalization on page 229 for additional information. 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. The battery can be discharged at idle if the electrical loads are very high. This is true for all vehicles. This is because the generator (alternator) may not be spinning fast enough at idle to produce all the power that is needed for very high electrical loads. Overhead Console Reading Lamps Your vehicle may have reading lamps located on the overhead console. Press the lens to turn them on and off. Rear Assist Handle Reading Lamps Your vehicle may have reading lamps located near the rear assist handles. Press the lens to turn them on and off. 163