2003 Chevrolet Impala Owner's Manual - Page 140

Interior Lamps Instrument Panel Brightness This feature controls the instrument panel lights. The control for this feature is located on the exterior lamps control. Your parking lamps must be on for this feature to work. Turn the control clockwise to brighten the lights or counterclockwise to dim them. Entry lighting includes a feature called theater dimming. With theater dimming, the lamps don't just turn off at the end of the delay time. Instead, they slowly dim after the delay time until they go out. The delay time is canceled if you turn the ignition key to ON or press the power door lock switch. The lamps will dim right away. When the ignition is on, illuminated entry is inactive, which means the courtesy lamps won't come on unless a door is opened. Courtesy Lamps When any door is opened, several lamps come on. These lamps are courtesy lamps. They make it easy for you to enter and leave your vehicle. You can also turn these lamps on by turning the exterior lamps control all the way clockwise. Some of the lamps have switches so you can turn them on, even when the doors are closed. These lamps are reading lamps. Delayed Entry Lighting Delayed entry lighting illuminates the interior for a period of time after all the doors have been closed. The ignition must be off for delayed entry lighting to work. Immediately after all the doors have been closed, the delayed entry lighting feature will continue to work until one of the following occurs: The ignition is moved to ON, an illumination period of 25 seconds has elapsed. If during the illumination period a door is opened, the timed illumination period will be canceled and the interior lamps will remain on because a door is open. Entry Lighting Your vehicle may be equipped with courtesy lamps that will come on and stay on for a set time whenever you press UNLOCK on the remote keyless entry transmitter (if equipped). If you open a door, the lamps will stay on while it's open ana then turn off automaticaiiy about 25 seconds after you close it. If you press UNLOCK and don't open a door, the lamps will turn off after about 40 seconds. 3-17