GM Service Manual Online
For 1990-2009 cars only

Object Number: 1545081  Size: A1

The exterior lamps control is located on the instrument panel to the left of the steering wheel.

It controls the following systems:

    • Headlamps
    • Taillamps
    • Parking Lamps
    • License Plate Lamps
    • Instrument Panel Lights
    • Fog Lamps

The exterior lamps control has four positions:

(Off): Turns off the exterior lamps except for Daytime Running Lamps (DRL).

AUTO (Automatic): Automatically turns on the headlamps at normal brightness, together with the following:

    • Parking Lamps
    • Instrument Panel Lights
    • IntelliBeam™
(Parking Lamps): Turns on the parking lamps together with the following:

    • Instrument Panel Lights
    • License Plate Lamps
    • Taillamps
    • Side Marker Lamps

The parking brake indicator light comes on and stays on while the parking lamps are on with the engine off and the ignition in ACC/ACCESSORY or ON/RUN.

&(Headlamps): Turns on the headlamps together with the previously listed lamps. A warning chime sounds if the driver's door is opened while the ignition switch is off and the headlamps are on.

(Fog Lamps): Press the exterior lamps control to turn on the fog lamps. See Fog Lamps .

IntelliBeam™ Intelligent High-Beam Headlamp Control System

For vehicles with this feature, be sure to read this entire section before using it.

IntelliBeam is an enhancement to the vehicle's headlamp system. Using a digital light sensor on the rearview mirror, this system turns the vehicle's high-beam headlamps on and off according to surrounding traffic conditions.

The IntelliBeam system turns the high-beam headlamps on when it is dark enough, there is no other traffic present, and the IntelliBeam system is enabled.

Turning On and Enabling IntelliBeam™

Press and release the IntelliBeam button on the inside rear view mirror. The IntelliBeam indicator on the mirror turns on to indicate the system is on. Once the system has been turned on, it remains on each time the vehicle is started, but the IntelliBeam system must be enabled.

To enable the IntelliBeam system, turn the exterior lamp control to AUTO, with the turn signal/multifunction lever in its neutral position. The High-Beam On Light appears on the instrument panel cluster when the high-beams are on. See Highbeam On Light .

Driving with IntelliBeam™

IntelliBeam only activates the high-beams when driving over 20 mph (32 km/h).

The high-beam headlamps remain on, under the automatic control of IntelliBeam, until any of the following situations occur:

    • The system detects an approaching vehicle's headlamps.
    • The system detects a preceding vehicle's taillamps.
    • The outside light is bright enough that high-beam headlamps are not required.
    • The vehicle's speed drops below 15 mph (24 km/h).
    • The headlamp stalk is moved forward to the high-beam position or the flash-to-pass feature is used. See Headlamp High/Low-Beam Changer and Flash-to-Pass .
        When either of these conditions occur, the IntelliBeam feature is disabled and the IntelliBeam light in the mirror turns off until the high-beam stalk is returned to the neutral position.
    • If IntelliBeam was using low-beams prior to this action, the IntelliBeam feature is temporarily disabled until the stalk is returned to the neutral position.
    • The exterior lamp control is turned to any setting except AUTO.
        When this occurs, IntelliBeam is disabled until the control is turned back to the AUTO position.
    • The IntelliBeam system is turned off at the inside rearview mirror.

IntelliBeam might not turn off the high-beams if the system cannot detect other vehicle's lamps because of any of the following:

    • The other vehicle's lamp(s) are missing, damaged, obstructed from view, or otherwise undetected.
    • The other vehicle's lamp(s) are covered with dirt, snow, and/or road spray.
    • The other vehicle's lamp(s) cannot be detected due to dense exhaust, smoke, fog, snow, road spray, mist, or other airborne obstructions.
    • Your vehicle's windshield is dirty, cracked, or obstructed by something that blocks the view of the IntelliBeam light sensor.
    • Your vehicle's windshield is covered with ice, dirt, haze, or other obstructions.
    • Your vehicle is loaded such that the front end of the vehicle points upward, causing the IntelliBeam sensor to aim high and not detect headlamps and taillamps.
    • You are driving on winding or hilly roads.

You might need to manually disable or cancel the high-beam headlamps by turning the low-beam headlamps on, if any of the above conditions exist.

Disabling and Resetting IntelliBeam™ at the Rearview Mirror

IntelliBeam can be disabled by using the controls on the inside rearview mirror.

AUTO (On/Off): Press this button on the inside rearview mirror to disable the system. The IntelliBeam indicator turns off and does not come back on until the IntelliBeam button is pressed again.

When IntelliBeam has turned on the high-beams, pull or push the high-beam stalk. This will disable IntelliBeam. The IntelliBeam indicator on the mirror turns off. To turn IntelliBeam back on, press the IntelliBeam button on the mirror.

A different sensitivity setting is available for dealer/retailer diagnostics. This is done by pushing and holding this button for 20 seconds until the IntelliBeam indicator light flashes three times. If you accidentally activate this, the vehicle' s setting automatically is reset when the ignition is turned off and then on again.

Cleaning the IntelliBeam™ Light Sensor


Object Number: 1459946  Size: A2

The light sensor is located on the inside of the vehicle in front of the inside rearview mirror.

Clean the light sensor window, periodically, using glass cleaner on a soft cloth. Gently wipe the sensor window. Do not spray glass cleaner directly on the surface of the sensor window.