Inside Rearview Mirror

INSIDE REARVIEW MIRROR WITH THE AUTOMATIC DAY-NIGHT FEATURE SYSTEM COMPONENTS
The inside rearview mirror with the automatic day-night feature system consist of an inside rearview mirror.

INSIDE REARVIEW MIRROR WITH THE AUTOMATIC DAY-NIGHT FEATURE OPERATION
With the ignition switch in the ON position, ignition 3 voltage is supplied through the IGN 3 RR fuse to the inside rearview mirror. The inside rearview mirror uses 2 photocell sensors in order to determine light conditions in the front and the back of the vehicle. At night, with the automatic day-night feature enabled, the mirror automatically darkens to reduce the glare from the headlamps from behind. In the daytime, be mirror is in a normal state. With the gear selector lever in the REVERSE position, backup lamp supply voltage is supplied as an input to the inside rearview mirror. The inside rearview mirror will gradually change to a normal state as a result of the backup lamp supply voltage input. Ground for the inside rearview mirror is provided by G402.

COMPASS
The electronic compass includes a magnetic field sensor and a microprocessor. The microprocessor receives inputs from the sensor. processes these inputs, and provides a heading on the compass display.

SWITCHES OF THE INSIDE REARVIEW MIRROR WITH THE AUTOMATIC DAY-NIGHT FEATURE WITHOUT COMPASS
The inside rearview mirror has tour switches that perform the following functions:
^ The on/off switch located at the left side of the mirror. The on/off switch is used to enable or disable the automatic day-night feature of the mirror. With the ignition in the ON position, depress the on/off switch to enable the automatic day-night feature of the mirror. A green indicator will illuminate on the mirror when the automatic day-night feature is enabled. To disable the automatic day-night feature of the mirror, depress the on/of switch.
^ The three switches on the right side of the mirror are for OnStar(R) operation. For more information, refer to OnStar(R) Description and Operation in Cellular Communications.

SWITCHES OF THE INSIDE REARVIEW MIRROR WITH THE AUTOMATIC DAY-NIGHT FEATURE WITH COMPASS
The inside rearview mirror has 4 switches that perform the following functions:
The on/off switch located at the left side of the mirror performs the following functions:
- To enable or disable the automatic day-night feature of the mirror. With the ignition in the ON position, depress and hold the on/off switch for 4 seconds to enable the automatic day-night feature of the mirror. A green indicator will illuminate on the mirror when the automatic day-night feature is enabled. To disable the automatic day-night feature of the mirror, depress and hold the on/off switch for 4 seconds.
- To turn the compass on and Off. With the ignition in the ON position, depress the on/off switch to turn the compass on. Depress the on/off switch again to turn the compass Off. The on/off switch is also used to place the compass into a calibration or zone mode. For more information, refer to Compass Calibration and Variance Procedure.
^ The 3 switches on the right side of the mirror are for OnStar(R) operation. For more information, refer to OnStar(R) Description and Operation in Cellular Communications.