GM Service Manual Online
For 1990-2009 cars only

Visual/Physical Inspection

An understanding of both the outside and automatic day-night mirror operation must be understood before reviewing the symptom tables. Refer to Outside Mirror Description and Operation and Automatic Day-Night Mirror Description and Operation .

    • Inspect for aftermarket devices which could affect the operation of the automatic day-night feature of the inside rearview mirror. Refer to Checking Aftermarket Accessories .
    • Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

    •  Heated Mirrors Inoperative
    •  Automatic Day-Night Mirrors Inoperative
    •  Power Mirror Folding Inoperative
    •  Power Mirrors Inoperative