GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2000 🢒 Chevy C Silverado - 2WD 🢒 Body and Accessories 🢒 Wiring Systems 🢒 Automatic Day-Night Mirror Description

Object Number: 264773 Size: SH
  1. The rear view mirror with compass automatically dims to a level required in order to minimize glare while still maintaining maximum rear vision when the auto mirror is enabled.
    2. • The mirror will display "ICE" in the temperature/compass display area when the ignition is first turned on and the ambient temperature is 37° F (3° C) or below. The display will toggle between ice and the actual outside temperature for approximately 4 minutes.
    • The mirror will display "OC" if the mirror senses a temperature of less than -40.
    • The mirror will display "SC" if the mirror senses a temperature of greater than +143F (112° C).
  2. The compass is an 8 point compass readout that calibrates automatically as the vehicle is driven.
  3. There are 2 buttons on the bottom of the mirror.

    4. Use the COMP button in order to turn ON or OFF the auto mirror feature.

    Use the TEMP button in order to display the outside temperature reading.

  4. In order to operate the mirror and compass, perform the following steps:
    5. 4.1. Turn the vehicle ignition switch to the ON position.
    4.2. Push in the MIRROR/TEMP side of the switch in order to turn the auto mirror ON or OFF.

    Auto mirror is enabled when Auto LED is ON.

    4.3. Push in the MIRROR/TEMP side of the switch and hold 3 seconds.

    The mirror will darken and remain dark until the switch is released.

    Upon release, the auto mirror is enabled.

    4.4. Push in the COMP button in order to turn the compass ON/OFF.

    The compass is enabled then a direction is displayed in the mirror compass window.

    4.5. If a different zone selection is desired. Refer to Compass Calibration Description .
  5. The compass should display either a direction or a C. If the compass is not operating properly, perform the following steps:
    6. 5.1. Go to mirror function checkout.

    If the function display characters are not on, check that the compass is working by pushing the COMP button on the bottom of the mirror.

    5.2. Recheck that the ignition is ON.
  6. If the compass display characters are not displayed, check for the following possible problems:
    7. 6.1. Remove the connector from the rear of the housing.
    6.2. Check for ignition switched battery voltage at the connector with a digital volt meter.
    6.3. Check to make sure that the ignition switched battery voltage is 11.0--15 volts.
    6.4. If the correct voltage is present between terminals, replace the mirror assembly.
    6.5. If 0 voltage is between terminals, check the fuse and wiring harness from the mirror to the fuse box and the chassis ground.

Temperature Display Update Process

The inside rearview mirror has a temperature program that takes in account the fact that the radiator will heat the ambient air temperature sensor if the radiator is warm and the vehicle is not moving. If the vehicle has been off for more than 2 hours, the mirror temperature program assumes that the radiator has cooled and that the temperature supplied by the ambient air temperature sensor is accurate. Because of this, if the vehicle has been off for more than 2 hours, the mirror displays the temperature as reported by the ambient air temperature sensor. When the ambient air temperature sensor reports a new temperature to the mirror, one of the following cases will apply:

    • Ignition is OFF for more than 2 hours, then is turned ON for more than 3 minutes. The outside temperature is greater than the last temperature recorded by the mirror for 2 minutes. The mirror will increase the last temperature reading by one degree every 2 minutes for 8 consecutive times. If the outside temperature is not matched after the 8th update, the mirror will then display the current outside temperature.
    • Ignition is off for more than 2 hours, then is turned ON for less than 3 minutes. The mirror will update the temperature display every 2 seconds.
    • Ignition is OFF for more than 2 hours, then is turned ON for more than 3 minutes. The outside temperature is less than the last temperature recorded by the mirror. The mirror will then display the current outside temperature.
    • Ignition has been OFF for less than 2 hours. The outside temperature is greater than the last temperature recorded by the mirror, but the ignition is cycled from ON to OFF within 2 minutes. The mirror will display the old temperature.
    • Ignition has been OFF for less than 2 hours. The outside temperature is less than the last temperature recorded by the mirror. The mirror will then display the current outside temperature.