1999 Pontiac Grand Am Owner's Manual - Page 102

yellowblue Lamps On Reminder If you turn off the ignition and open the driver's door while leaving the lamps on, you will hear a warning chime. When the DRL system is on, the taillamps, sidemarker lamps, park lamps and instrument panel lights will not be illuminated. The DRL system will remain off any time your vehicle is in PARK (P) or the parking brake is engaged and the vehicle speed is less than 3 mph (1.9 km/h). As with any vehicle, you should turn on the regular headlamp system when you need it. Daytime Running Lamps 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. The DRL system will make your high-beam headlamps come on at a reduced brightness when: Automatic Light Control (ALC) When it is dark enough outside, your Automatic Light Control (ALC) will turn on your headlamps along with other lamps such as the taillamps, sidemarker lamps, park lamps and the instrument panel lights. The radio lights will also be dim. Your vehicle is equipped with a light sensor on the top of the instrument panel under the defroster grill, so be sure it is not covered. This will cause the ALC system to be on whenever the ignition is on. The ALC system may also come on when driving through a parking garage, heavy overcast weather or a tunnel. This is normal. D The ignition is on, D The headlamp switch is in OFF or you have turned on your parking lamps, D The light sensor detects daytime light, D The parking brake is released and D The shift lever is not in PARK (P). 2-38