2002 Chevrolet Impala Owner's Manual - Page 121

The exterior lamps control has three positions: OFF:Pushing the control all the way in turns off the exterior lamps. Parking Lamps:Pulling the control out halfway will turn on the parking lamps together with the following: A light sensor on top of the instrument panel makes the DRL work, so be sure it isn't covered. The DRL system's automatic headlamp control will make your high-beam headlamps come on at a reduced brightness when the following conditions are met: D Taillamps D LIcense Plate Lamps D Instrument Panel Lights Headlamps: Pulling the control all the way out turns on the headlamps together with the previously listed lamps and lights. See "Interior Lamps" later in this section for information on the instrument panel brightness control and on the dome lamps. A warning chime will sound if you open the driver's door when the ignition switch is off and the headlamps are on. D The ignition is on, D the exterior lamps control is off and D the gearshift is not in PARK (P). When the DRL are on, only your high-beam headlamps, at a reduced level of brightness, will be on. The headlamps, taillamps, sidemarker and other lamps won't be on. Your instrument panel and cluster won't be lit up either. When it's dark enough outside, your high-beam headlamps will turn off and the headlamps and parking lamps will turn on. The other lamps that come on with your headlamps will also come on. When it's bright enough outside, your headlamps will go off and your DRL will come on. As with any vehicle, you should turn on the regular headlamp system when you need it. Daytime Running Lamps / Automatic Headlamp Control Daytime Running Lamps (DRL) can make it easier for others to see the front of your vehicle during the day. DRL can be helpful in many different driving conditions, but they can be especially helpful in the short periods after dawn and before sunset. Fully functional daytime running lamps are required on all vehicles first sold in Canada. 2-55