GM Service Manual Online
For 1990-2009 cars only

Exterior Lamps

The exterior lighting system includes the following components:

    • Headlamps (high and low beam)
    • Front park/turn signal lamps
    • Tail/rear turn signal lamps
    • Front sidemarker lamps
    • Rear sidemarker lamps
    • High-mounted stoplamp
    • Backup lamps
    • License lamp

This system also includes all wiring controls and related hardware required for the operation of these lamps.

Headlamps

The headlamps are controlled by the headlamp switch located on the instrument panel. If you pull the headlamp knob out halfway, it will turn on the parking lamps and the operating lamps. If you pull the headlamp knob all the way out, the headlamps will come on. Push the headlamp knob all the way in to turn off all the lamps. A warning chime will sound if you open the driver's door when you turn the ignition switch to OFF or ACC with the lamps on. To change the headlamps from low beams to low beams, or high to low, pull the multifunction lever all the way toward you, then release the multifunction lever. To use the flash-to-pass pull the multifunction lever toward you a little, but not so far that you hear a click. If the headlamps are off or on low-beam, the high-beam headlamps will turn on. The high-beam will stay on as long as you hold the lever toward you. The high-beam indicator on the instrument panel will come on during this operation. Release the multifunction lever to turn off the high-beams headlamps.

Daytime Running Lamps (DRL)

A light sensor on top of the instrument panel makes the DRL system work, be sure that it is not covered. The DRL system will make the high-beam headlamps come on at a reduced brightness when, the ignition is on the headlamp switch is off and the parking brake is released. When the DRL system is on, only the high-beam headlamps will be on. The headlamps, tail lamps, sidemarker, instrument panel lamps will not be on. When it is dark enough outside, the high-beam headlamps will turn off and the vehicles headlamps and parking lamps will turn on, including all other lamps that come on with the headlamps. When it is bright enough outside, the headlamps will go off and the high-beam headlamps will come on.

Fog Lamps

To turn on the fog lamps on, turn on your parking lamps and then press the fog lamp switch located next to the headlamp switch on the left side of the steering column. A light will glow on the fog lamp switch to let you know that the fog lamps are on. Press the fog lamp switch again to turn the fog lamps off. The fog lamps will go off whenever you turn on the high-beam headlamps. When you return to the low-beams, the fog lamps will turn on again.

Front Parking/Turn Signal Lamps

The front parking/turn signal lamps are located in the LH and RH headlamp capsules. These lamps can be operated at any time by turning the multifunction lever. When a turn is signaled, the appropriate front parking lamp flashes to signal a turn. The turn signals operate only with the ignition switch in RUN and will not operate during hazard flasher operation.

Front Side Marker Lamps

The front side marker lamps are located on the sides of the headlamp capsule. These lamps will light whenever the following conditions are met:

    • Headlamp or parking lamps ON.
    • If the headlamp or parking lamps are OFF when a turn is signaled, the appropriate front side marker lamp will flash in unison with the front turn signal lamp.
    • If the headlamps or parking lamps are ON when a turn is signaled, the front side marker lamp and front turn signal lamp flash alternately.

Tail Lamps

The tail lamps, stop lamps and rear turn signal lamps are all incorporated into the rear tail lamp. The tail lamps are lit whenever the parking lamps or headlamps are in operation. The rear turn signal lamps flash with the front turn signal lamps whenever a turn is indicated with the turn signal/headlamp dimmer switch. The stop lamps light whenever the brake pedal is depressed and the stop lamp switch is closed.

Backup Lamps

The backup lamps are located in the tail lamps (coupe) and the rear compartment lid apologue (sedan). These lamps will light whenever the following condition is met:

Ignition switch in the ON positioned and the transaxle in reverse.

High-Mounted Stop Lamp

The high-mounted stop lamp is located in the center of the rear compartment lid. The high-mounted stop lamp lights whenever the brake pedal is depressed and the stop lamp switch is closed.

License Lamps

The license lamps are located in the rear bumper fascia. Whenever the headlamp or parking lamp switch is turned, the lamps lights.

Interior Lamps

The interior lighting system includes side rail lamps and convenience lamps such as the compartment lamp, lighted rearview mirror and visor vanity mirror lamp. All associated wiring, controls and related hardware for these lamps are also included.

Courtesy Lamps

Two courtesy lamps under the instrument panel will come on when a door is opened, or when the interior lamps are turned on. To turn on the courtesy lamps by moving the interior lamp dial all the way to the right.

Instrument Panel Compartment Lamp

The instrument panel compartment lamp will come on when the instrument panel compartment door is opened.

Lighted Visor Mirror

On vehicles so equipped, the lamps next to the visor mirror will come on when the mirror cover is raised.

Side Rail Lamps

The side rail lamps will come on when a door is opened, or when the inside lamps are turned on. Turn the side rail lamp on or off using a switch in the side rail lamp.

Rear Compartment Lamp

The rear compartment lamp will come on whenever the rear compartment lid is opened.

Illuminated Entry System

The courtesy lamps will come on and stay on for on for 40 seconds, whenever the UNLOCK button is pressed on the remote keyless entry transmitter. When a door is opened the courtesy lamps will stay on while the door is open and then turn off in 25 seconds after the door is closed. The theater dimming feature slowly dim after the delay time until the courtesy lamps go out. The delay time is canceled if you turn the ignition key to RUN, START or press the power door lock switch, then the courtesy lamps will dim right away.