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 DRL are required on all vehicles first sold in Canada.

The DRL system makes the front turn signal lamps come on when the following conditions are met:

    • It is still daylight and the ignition is on.
    • The exterior lamp control is in the off position.
    • The transmission is not in PARK (P).

When DRL are on, only the front turn signal lamps are on. No other exterior lamps such as the parking lamps, taillamps, etc. are on when the DRL are used. Your instrument panel is not be lit up either.

When it is dark enough outside, the front turn signal lamps turn off and normal low-beam headlamps turn on.

When it is bright enough outside, the regular lamps go off, and the front turn signal lamps take over. If you start your vehicle in a dark garage, the automatic headlamp system comes on immediately. Once you leave the garage, it takes about one minute for the automatic headlamp system to change to DRL if it is light outside. During that delay, the instrument panel cluster might not be as bright as usual. Make sure the instrument panel brightness knob is in the full bright position. See Instrument Panel Brightness for more information.

If it is dark enough outside and the exterior lamp control is off, a HEADLAMPS SUGGESTED message displays on the Driver's Information Center (DIC). This message informs the driver that turning on the exterior lamps is recommended. See DIC Warnings and Messages .

Turn the exterior lamp control off a second time, or turn on the headlamps to turn off the HEADLAMPS SUGGESTED message in the DIC. If the parking lamps or the fog lamps were turned on instead, the HEADLAMPS SUGGESTED message continues to display.

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