GM Service Manual Online
For 1990-2009 cars only

Object Number: 810742  Size: A2

The control located on the left side of the instrument panel operates the exterior lamps.

(Exterior Lamp Control): Turn the control with this symbol on it to operate the exterior lamps.

The exterior lamp control has three positions:

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

(Parking Lamps): Turn the control to this position to turn on the parking lamps together with the following:

    • Sidemarker Lamps
    • Taillamps
    • License Plate Lamps
    • Instrument Panel Lights

The parking brake indicator light will come on and stay on while the parking lamps are on with the engine off and the ignition in ACC or ON.

& (Headlamps): Turn the control to this position to turn on the headlamps, together with the previously listed lamps and lights.

Your vehicle may be equipped with High Intensity Discharge (HID) headlamps. These headlamps come on at a lower intensity and gradually increase to full brightness.

Wiper-Activated Headlamps

This feature activates the headlamps and parking lamps after the windshield wipers have been in use for about six seconds. To operate, the Twilight Sentinel® feature must be turned on.

When the exterior lamp control is in the off or parking lamp position and the wiper control is on INT, LO or HI, the HEADLAMPS SUGGESTED message will appear on the Driver Information Center (DIC).

When the ignition is turned to OFF, the wiper-activated headlamps will immediately turn off. The wiper-activated headlamps will also turn off if the Twilight Sentinel® or the windshield wipers are turned off.

Lamps On Reminder

A warning chime will sound if the exterior lamp control is left on in either the headlamp or parking lamp position and the driver's door is opened with the ignition off.

Daytime Running Lamps

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 high-beam headlamps come on at reduced brightness when the following conditions are met:

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

When DRL are on, only your high-beam headlamps (at reduced brightness) will be on. No other exterior lamps such as the parking lamps, taillamps, etc. will be on when the DRL are being used. Your instrument panel will not be lit up either.

When the Twilight Sentinel® lever is on and it is dark enough outside, the high-beam headlamps (at reduced intensity) will turn off and normal low-beam headlamp operation will occur.

When the Twilight Sentinel® lever is on and it is bright enough outside, the regular lamps will go off, and the high-beam headlamps at reduced brightness will take over. If you start your vehicle in a dark garage, the automatic headlamp system will come on immediately. Once you leave the garage, it will take approximately one minute for the automatic headlamp system to change to DRL if it is light outside. During that delay, your instrument panel cluster may not be as bright as usual. Make sure your instrument panel brightness knob is in the full bright position. See "Instrument Panel Brightness" under Interior Lamps .

If it is dark enough outside and the Twilight Sentinel® lever is off, a HEADLAMPS SUGGESTED message will display on the Driver's Information Center (DIC). This message informs the driver that turning on the exterior lamps is recommended even though the DRL are still illuminated. Turning on the Twilight Sentinel® or the headlamps will deactivate the DRL and remove the HEADLAMPS SUGGESTED message. If the parking lamps or the fog lamps were turned on instead, the DRL will still deactivate and the HEADLAMPS SUGGESTED message will continue to be displayed.

To idle your vehicle with the DRL off at night, turn off the Twilight Sentinel® and shift the transaxle into PARK (P). Placing your vehicle in PARK (P) disables the DRL. The DRL will stay off until you shift out of PARK (P).

To drive your vehicle with the DRL off, turn off the Twilight Sentinel® and manually turn on the parking lamps or fog lamps.

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

Fog Lamps

Use the fog lamps for better vision in foggy or misty conditions.

(Fog Lamps): Press the button with this symbol on it, located next to the exterior lamp control, to turn the fog lamps on.

When the ignition is on and you press the fog lamp button, a small indicator light in the fog lamp button, the LIGHTS ON and fog lamp indicator lights on the instrument panel cluster will come on to indicate that the fog and the parking lamps are on.

Press the fog lamp button again to turn off the fog lamps.

If you turn on the high-beam headlamps, the fog lamps will turn off. They will turn back on again when you switch to low-beam headlamps.

When the Twilight Sentinel® is on and the fog lamps are turned on, the fog lamps, headlamps and parking lamps will remain on.

The ignition must be on for the fog lamps to operate.

Cornering Lamps

The cornering lamps come on when the headlamps or parking lamps are on and you signal a turn with the multifunction lever. They provide more light for cornering.

Twilight Sentinel®


Object Number: 810746  Size: A2

This lever is located below the exterior lamps control. It automatically turns the lamps on and off by sensing how dark it is outside.

To operate the Twilight Sentinel®, leave the exterior lamps control off and slide the TWILIGHT lever to any position but OFF.

If you move the lever all the way to the right, the lamps will remain on for approximately three minutes after the ignition has been turned to OFF. If you move the lever so it is barely on, the lamps will go off quickly when you turn the ignition switch out of OFF. You can adjust the delay time from only a few seconds to about three minutes.

If it is dark enough outside and the Twilight Sentinel® lever is off, a HEADLAMPS SUGGESTED message will display on the Driver Information Center (DIC). This message informs the driver that turning on the exterior lamps is recommended (it has become dark enough outside to require the headlamps and/or other exterior lamps). Turning on the Twilight Sentinel® or turning the exterior lamp control to the headlamp position will remove the HEADLAMPS SUGGESTED message.

Light Sensor


Object Number: 810758  Size: B3

The light sensor for the Daytime Running Lamps (DRL) and the Twilight Sentinel® is located on the driver's side of the front defogger grille.

If you cover the sensor, it will read "dark" and the exterior lamps or the HEADLAMPS SUGGESTED message will be on whenever the ignition is on.

Exterior Lighting Battery Saver

If the manual parking lamps or headlamps have been left on, the exterior lamps will turn off approximately ten minutes after the ignition is turned to OFF. This protects against draining the battery in case you have accidentally left the headlamps or parking lamps on. The battery saver does not work if the headlamps are turned on after the ignition switch is turned to OFF.

If you need to leave the lamps on for more than 10 minutes, use the exterior lamp control to turn the lamps back on. To delay the lamps from turning off, see Twilight Sentinel listed previously in this section.