GM Service Manual Online
For 1990-2009 cars only

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 low-beam headlamps come on at a reduced brightness when the following conditions are met:

    • The ignition is on.
    • The exterior lamp control is turned to AUTO and the light sensor detects daytime light.
    • The exterior lamp control is turned to the off position.
    • The parking brake is released.
    • For vehicles with automatic transmissions, the shift lever is not in PARK (P).

When the DRL system is on, the taillamps, sidemarker lamps, parking lamps, and instrument panel lights will not be illuminated unless you have turned the exterior lamps control to the parking lamp or headlamp position.

The DRL system will remain off any time your vehicle is in PARK (P) or the parking brake is engaged the first time the ignition is turned on.

As with any vehicle, you should turn on the regular headlamp system when you need it.