2012 Chevrolet Impala Owner's Manual - Page 150

6-6 Lighting Dome Lamps Reading Lamps Lighting Features Entry Lighting For vehicles with courtesy lamps, they come on and stay on for a set time whenever the unlock symbol is pressed on the Remote Keyless Entry (RKE) transmitter. If a door is opened, the lamps stay on while it is open and then turn off automatically about 20 seconds after the door is closed. If the unlock symbol is pressed and no door is opened, the lamps turn off after about 20 seconds. Entry lighting includes a feature called theater dimming. With theater dimming, the lamps do not turn off at the end of the delay time. Instead, they slowly dim and then go out. The delay time is canceled if the ignition key is turned to ON/RUN or the power door lock switch is pressed. The lamps will dim right away. The center mounted dome lamp overhead comes on when a door is opened. This lamp can also be turned on by turning the instrument panel brightness control clockwise. The vehicle has reading lamps that also act as the dome lamp. Press the button near each lamp to turn them on and off. Map Lamps The vehicle has map lamps on the rearview mirror. Press the button near each lamp on the mirror to turn the map lamps on and off.