GM Service Manual Online
For 1990-2009 cars only

Important: Complete the following procedures before using the symptom tables.

  1. Perform the Diagnostic System Check - Vehicle , in order to verify that all of the following conditions are true:
  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 .
    • Inspect the accessible system components for obvious damage or for conditions which can cause the symptom.

Intermittent

Bad electrical connections or wiring may cause intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections.

Symptom List

Refer to Power Sunroof Malfunction in order to diagnose the symptom.