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 will make the turn signal lamps come on in daylight when the following conditions are met:

    • The ignition is on.
    • The exterior lamp band is in the off or AUTO position.

When the DRL are on, the turn signal lamps will be on. The taillamps, sidemarker, and other lamps will not be on. The instrument panel back lighting will not be on either.

When the exterior lamp band is turned to the headlamp position, the headlamps will come on. The other lamps that come on with the headlamps will also come on.

When the headlamps are turned off, the regular lamps will go off, and the turn signal lamps will come on.