GM Service Manual Online
For 1990-2009 cars only

Headlamps

A rotary type switch controls the headlamps. The switch is located on the left side of the steering column. One switch position turns on the following lamps:

    • The parking lamps
    • The side marker lamps
    • The taillamps
    • The license plate lamp
    • The instrument panel lamps
    • The interior lamps

The second switch position turns on all of the above lamps plus the headlamps.

An instrument panel lamp dimmer control is provided in order to vary the intensity of the instrument panel lamps. Turn the control past the full bright detent in order to turn on the interior courtesy lamps.

Fog Lamp Switch

The fog lamp switch is located in the dimmer switch assembly. The following conditions must be met in order to turn on the fog lamps:

    • Place the ignition switch in the ON position.
    • Place the park lamps in the ON position.
    • Place the fog lamp switch in the ON position.
    • Turn off the high beams.

When the fog lamps are turned on (head and park lamps off), the following lamps must also be on:

    • The front and rear marker lamps
    • The park lamps
    • The taillamps
    • The license lamp
    • The instrument panel lamps

When you select the high beam head lamps, the fog lamps turn off.

Turn Signals

Directional signal lamps are combined with the parking lamps on the front of the vehicle. Turn on the ignition switch in order to operate the directional signal lamps with the turn signal switch.

With the directional signal lever in the center position, stepping on the brake pedal illuminates the rear stoplamps on both sides. If the switch is operating on either side as a directional signal, stepping on the brake pedal turns on the stoplamp only on the side that is not flashing.

The flasher that is used in this circuit controls only the directional signals. The flasher is located in the center instrument panel area.

The lane-change directional signal switch is standard equipment. When making a partial turn, such as when changing lanes, the driver has the option of moving the switch lever to a detent stop. The signal lamps will continue to flash as long as the lever is held in this position. The signal lamps will cancel automatically when the lever is released. Use the detent position in order to signal a shallow turn or lane change without possibility of failure to cancel.

Moving the directional signal switch lever past the detent position to the limit of the lever's travel for either turn will provide conventional turn signal operation. The front sidemarker lamps will flash with the turn signal lamps when the park lamps and headlamps are off. When the parking lamps or the headlamps are on, the front sidemarker lamps will flash alternately with the turn signal lamps on the same side of the vehicle.

With the headlamp switch in the ON position, the multifunction (turn signal) lever also functions as the headlamp dimmer control. Perform the following steps in order to switch the headlamps to high beam or low beam:

  1. Pull the lever toward the driver until a click is heard.
  2. Release the lever.

Hazard Warning Flashers

A hazard warning flasher is standard on all vehicles. The switch control button is located on the center of the instrument panel. Push the switch control button in order to disconnect the regular directional signal flasher and energize the hazard warning flasher. The hazard warning flasher will work with the ignition switch in any position. The turn signals will not work with the hazard flasher on. Push on the switch again in order to cancel the hazard warning flasher.

When the hazard warning flasher is operating, the following components flash:

    • The directional signal indicator lamps
    • All front turn signal lamps
    • All rear turn signal lamps
    • The front sidemarker lamps

If the brake pedal is depressed while the hazard warning flasher is operating, the center high mounted stoplamp will illuminate. The other lamps will continue to flash.

Backup Lamps

The backup lamps are designed in order to operate under the following conditions:

    • With the ignition switch in the ON position
    • With the transaxle in reverse

Placing the shift lever in REVERSE closes a switch, turning the backup lamps on. This is accomplished through a switch located on the transaxle assembly.

Daytime Running Lamps

Daytime running lamps (DRL) are standard on all vehicles that are sold in Canada and the United States. The DRLs improve the visibility of the vehicle when viewed from the front in daylight. The normal DRL system utilizes the headlamps at a reduced voltage.

Apply the parking brake or place the gear selector in PARK in order to override the DRL feature. The DRLs are fully active and unaffected by any further operation of the park brake under the following conditions:

    • With the ignition switch ON
    • With the parking brake OFF
    • The gear selector is not in the PARK position