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. Fully functional daytime running lamps are required on all vehicles first sold in Canada.

The DRL system makes the low-beam headlamps turn on at a reduced brightness when the following conditions are met:

    • The engine is running.
    • The light sensor determines it is night and the exterior lamps control is in the off position.
    • The light sensor determines it is daytime.

The taillamps and other lamps will be off.

The DRL turns off when the engine is not running.

The regular headlamps or parking lamps should be used when needed.