GM Service Manual Online
For 1990-2009 cars only

Important: Complete the following steps before you use the symptom tables.

  1. Perform Diagnostic System Check - Power Sunroof before you use the Symptom Tables in order to verify the following conditions:
  2. • No DTCs are set.
    • The control modules can communicate via the serial data link.
  3. Review the system operation in order to learn the system functions. Refer to Sunroof Description and Operation .

Visual/Physical Inspection

    • Inspect for aftermarket devices which can affect the operation of the Power Sunroof system. Refer to Checking Aftermarket Accessories in Wiring Systems.
    • Inspect the accessible system components for obvious damage or for conditions which can 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 in Wiring Systems.

Symptom List

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

    •  Power Sunroof Inoperative
    •  Power Sunroof Does Not Open
    •  Power Sunroof Express Open Feature Inoperative
    •  Power Sunroof Does Not Open to Vent Position
    • If the sunroof operates for more than 10 minutes after the ignition has been turned to OFF, refer to Retained Accessory Power (RAP) On After Timeout in Retained Accessory Power.