2010 Buick LaCrosse Owner's Manual - Page 142

5-6 Lighting For a vehicle with Keyless Access, the exterior lights and dome lamps automatically turn on when a door is opened after the ignition is turned off. See Ignition Positions (Keyless Access) on page 8‑18 or Ignition Positions (Key Access) on page 8‑19. The exterior lights turn off immediately by turning the exterior lamps control to OFF. The exit lighting feature can be activated, deactivated, or the timeframe for the lighting can be changed in the menu Settings in the Info. Display. Press CONFIG on the Infotainment system to access the menu. See Vehicle Personalization on page 4‑38. This feature can be activated or deactivated in the menu SETTINGS in the Info Display. Press CONFIG on the infotainment system to call up the menu. See Vehicle Personalization on page 4‑38. Battery Load 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 bring the charge back up. When the state of charge is high, the voltage is lowered slightly to prevent overcharging. If the vehicle has a voltmeter gauge or a 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 The headlamps, taillamps, parking lamps, reverse lamps, and license plate lamps come on at night, or in areas with limited lighting, when the key is removed from the ignition. The dome lamps also come on when the key is removed from the ignition. The exterior lights and dome lamps remain on after the door is closed for a set amount of time, then automatically turn off.