2012 Buick LaCrosse Owner Manual - Page 179

Lighting 6-7 Lighting Features Entry Lighting The headlamps, taillamps, license plate lamps, back‐up lamps, dome lamps, and most of the interior lights turn on briefly when the Remote Keyless Entry (RKE) K button is pressed, or when the door handle is pulled on a keyless access vehicle. See Ignition Positions (Key Access) on page 9‑18 or Ignition Positions (Keyless Access) on page 9‑20. After about 30 seconds the exterior lamps turn off, then the dome lamps and remaining interior lights dim to off. Entry lighting can be disabled manually by changing the ignition out of the OFF position, or by pressing the RKE Q button. This feature can be changed. See Vehicle Personalization on page 5‑43. Exit Lighting The headlamps, taillamps, parking lamps, back‐up 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. For vehicles 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 (Key Access) on page 9‑18 or Ignition Positions (Keyless Access) on page 9‑20. The exterior lights turn off immediately by turning the exterior lamps control off. This feature can be changed. See Vehicle Personalization on page 5‑43. 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.