Symptoms - Mirrors

Symptoms - Mirrors

Note: The following steps must be completed before using the symptom tables.

1. Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle before using the Symptom Tables in order to verify that all of the following are true:

* There are no DTCs set.

* The control modules can communicate via the serial data link.

2. Review the system operation in order to familiarize yourself with the system functions. Refer to the following system descriptions:

* Outside Mirror Description and Operation (with LTZ or SLT) Outside Mirror (with LTZ or SLT)Outside Mirror Description and Operation (without LTZ or SLT) Outside Mirror (without LTZ or SLT)

* Automatic Day-Night Mirror Description and Operation Automatic Day-Night Mirror

* OnStar Description and Operation OnStar

Visual/Physical Inspection

* Inspect for aftermarket devices which could affect the operation of the system. Refer to Checking Aftermarket Accessories 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 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 Malfunction (with SLT) Heated Mirrors Malfunction (with SLT)

* Automatic Day-Night Mirrors Malfunction Automatic Day-Night Mirrors Malfunction

* Power Mirror Malfunction (with LTZ or SLT) Power Mirror Malfunction (with LTZ or SLT)Power Mirror Malfunction (without LTZ or SLT) Power Mirror Malfunction (without LTZ or SLT)

* Power Mirror Tilt Inoperative in Reverse Power Mirror Tilt Inoperative in Reverse

* OnStar Button LED Malfunction (with UYS/UYX) OnStar Button LED Malfunction (with UYS/UYX)OnStar Button LED Malfunction (without UYS/UYX) OnStar Button LED Malfunction (without UYS/UYX)

* OnStar Button Malfunction (with UYS/UYX) OnStar Button Malfunction (with UYS/UYX)OnStar Button Malfunction (without UYS/UYX) OnStar Button Malfunction (without UYS/UYX)