1998 Pontiac Grand Am Owner's Manual - Page 104

Daytime Running Lamps Daytime Running Lamps(Dm) make it easier can 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: 0 0 As with any vehicle, you should on the regular turn headlamp system when you need it. Automatic Light Control (ALC) Your vehicle is equipped with an automatic light sensor grin, on topof the instrument panel under the defroster so be sureit is not covered which cause the will nighttime lights to be on continuously. When it is dark enough outside, ALC will turn on your your headlamps that you were last using at the normal brightness along with other lamps such the taillamps, as sidemarker, parking lamps and instrument panel lights. There is a 20-second delaythe transition between in of daytime and nighttime operation the DRL and L C systems. If thelight sensor senses a reduction lighting in that lasts longer than 20-seconds, it will activate the nighttime lamps. If you are driving through a parking garage, heavy overcast weather, a tunnel or fueling your vehicle in a low light area, ALC will turn on your the low-beam headlamps at a normal brightness along with the taillamps, sidemarker lamps, parking lampsand the instrument panel lights. radio lights will be dimmer. The As with any vehicle, you should turn the regular on headlamp system when need it. you The engine is running, The headlamp switch is OFF, The light sensor detects daytime light, The parking brakeis released and The shift leveris not in PARK (P) on an automatic transaxle. When theDRL system ison, the taillamps, sidemarker, parking lamps and instrument panel lights will not be illuminated. The DIU and ALC systems will remain off any time your automatic transaxle vehicle in Park (P) and the is parking brake is engaged. The DFU and ALC systems will remain off any time (N) your manual transaxle vehicle is in Neutral and the parking brake is engaged.