GM Service Manual Online
For 1990-2009 cars only

The night vision system is a monochromatic option available to improve the vision of the driver beyond the scope of the headlamps.

The night vision operates only under the following conditions:

    • The ignition is ON.
    • The front fog lamps or the headlamps are ON during low light conditions.
        The night vision system uses the signal from the ambient light sensor to determine when low light conditions exist.
    • The night vision system is ON.

The night vision system contains the following components:

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The head-up display (HUD)

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The head-up display (HUD) switches

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The night vision camera

Head-Up Display (HUD)

The head-up display (HUD) is a secondary display system that projects the night vision video images onto the windshield. The HUD projects the detected object images onto the windshield based on the video signals from the night vision camera.

Head-Up Display Switches

On/Off and Dimming Switch

The on/off and dimming switch turns the HUD display and the night vision system On or Off. When the HUD is turned on, the system warm up logo is displayed for a period of approximately 45 seconds. The on/off and dimming switch is also used to adjust the brightness of the video image. Moving the switch up will increase the HUD video image brightness. Moving the switch down will decrease the HUD video image brightness.

Up/Down Switch

The HUD in the night vision system has an electric tilt adjust motor that adjusts the video image to the preferred windshield location of the driver. Pressing the up/down switch directs the tilt motor to adjust the night vision video image up or down, within a certain range.

Night Vision Camera

The night vision camera senses the heat given off by objects that are in the field of view of the camera. Warmer objects, such as pedestrians, animals, and other moving vehicles, appear whiter on the displayed image. Colder objects, such as the sky, signs and parked vehicles, appear darker on the displayed image. The night vision camera sends the detected object image information to the HUD via the high video signal circuit and the low video signal circuit.