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 are helpful in many different driving conditions, but they can be especially helpful in the short periods after dawn and before sunset. Fully functional DRL are required on all vehicles first sold in Canada. The vehicle has a light sensor on top of the instrument panel that controls the DRL. Make sure it is not covered, or the head lamps will be on when they are not needed.

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

    • The ignition is on.
    • The exterior lamps control is in AUTO.
    • The exterior lamps control is in the parking lamps only position (This applies only to vehicles that are first sold in Canada).
    • The light sensor detects daytime light.
    • The parking brake is released or the vehicle is not in PARK.

When the DRL system is on, the taillamps, sidemarker lamps, parking lamps, and instrument panel lights are not on unless you turn the exterior lamps control to the parking lamp position.

As with any vehicle, you should turn on the regular headlamp system when they are needed.

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 DRL are required on all vehicles first sold in Canada.

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

    • The ignition is on.
    • The exterior lamp control is turned to AUTO. For vehicles first sold in Canada, the DRL turns on when the parking lamps are turned on.
    • The light sensor detects daytime light. See the end of this section for more information on the light sensor.
    • The shift lever is not in PARK (P).

While the DRL system is on, the taillamps, sidemarker lamps, and instrument panel lights will not be illuminated.

The DRL system will be off any time your vehicle is in PARK (P). The DRL system on vehicles sold in the U.S. can also be turned off by using the off/on switch for one ignition cycle.

Turn on the regular headlamp system when needed.

Light Sensor

Your vehicle has a light sensor on top of the instrument panel. Make sure it is not covered or the headlamps may remain on when they are not needed. The light sensor for the DRL and Automatic Headlamp features is located on top of the instrument panel.

The automatic headlamp system may be on when driving through a parking garage, heavy outcast weather, or a tunnel. This is normal.