GM Service Manual Online
For 1990-2009 cars only

Object Number: 805346  Size: B3

The exterior lamp control is located on the driver's side of the instrument panel.

The exterior lamp control has three positions:

(Off): Turning the control to this position turns off all lamps except the Daytime Running Lamps (DRL).

(Parking Lamps): Turning the control to this position turns on the parking lamps, together with the following:

    • Sidemarker Lamps
    • Taillamps
    • License Plate Lamps
    •  Instrument Panel Lights
    • Ashtray Lamp
(Headlamps): Turning the control to this position turns on the headlamps, together with the previously listed lamps and lights.

Automatic Headlamp System

When it is dark enough outside, your automatic headlamp system will turn on your headlamps at the normal brightness along with other lamps such as the taillamps, sidemarker, parking lamps and the instrument panel lights. The radio lights will also dim.

Your vehicle is equipped with a light sensor on the top of the instrument panel in the defroster grille. Be sure it is not covered, or the system will be on whenever the ignition is on.

The system may also turn on your headlamps when driving through a parking garage, heavy overcast weather or a tunnel. This is normal.

There is a delay in the transition between the daytime and nighttime operation of the Daytime Running Lamps (DRL) and the automatic headlamp systems so that driving under bridges or bright overhead street lights does not affect the system. The DRL and automatic headlamp system will only be affected when the light sensor sees a change in lighting lasting longer than the delay.

To idle your vehicle with the automatic headlamp system off, set the parking brake while the ignition is off. Then start your vehicle. The automatic headlamp system will stay off until you release the parking brake.

You may be able to turn off your automatic headlamp system. See "Daytime Running Lamps (DRL)" later in this section for more information.

As with any vehicle, you should turn on the regular headlamps when you need them.

Lamps On Reminder

A reminder tone will sound when your headlamps or parking lamps are manually turned on and your ignition is in OFF, LOCK or ACCESSORY. To disable the tone, turn the instrument panel brightness thumbwheel all the way down. In the automatic mode, the headlamps turn off once the ignition key is in OFF.

Daytime Running Lamps (DRL)

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 your headlamps come on at a reduced brightness when the following conditions are met:

    • The ignition is on,
    •  the exterior lamp control is off.
    • the automatic transmission is not in PARK (P),
    •  the light sensor determines it is daytime and
    •  the parking brake is released.

When the DRL are on, only your DRL lamps will be on. The taillamps, sidemarker and other lamps won't be on. Your instrument panel won't be lit up either.

When it begins to get dark, the automatic headlamp system will switch from DRL to the headlamps or the last chosen headlamp setting that was used.

To idle your vehicle with the DRL off, put the transmission in PARK (P). The DRL will stay off until you shift out of PARK (P).

The following does not apply to vehicles first sold in Canada.

When necessary, you may turn off the automatic headlamp system and the Daytime Running Lamps (DRL) feature by following the steps below:

  1. Turn the ignition to RUN.
  2. Press the DOME OVERRIDE button four times within six seconds. After the fourth press of the button, a chime will sound informing you that the system is off.

To return to the automatic mode, push the DOME OVERRIDE button four times within six seconds (the chime will sound), or turn the ignition to off and then to RUN again.

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