Data List
WARNING: This page is about a different car, the 2003 Buick Regal and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
Ambient Light Sensor: The scan tool displays 2.1 to 4.3 volts. The voltage level varies based upon the amount of light detected by the ambient light sensor. When the sensor detects full bright the scan tool will display 2.1 volts. When low light is detected the scan tool will display 4.3 volts.