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Tahoe / Yukon Service Manual

Symptoms - Fixed and Moveable Windows

  1. Perform the 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 module(s) can communicate via serial data link.
  2. Review the system description and operation in order to familiarize yourself with the system functions. Refer to the following: Power Windows Description and Operation Rear Window Defogger Description and Operation Visual/Physical Inspection Inspect for aftermarket devices which may affect the operation of the system. Inspect the easily accessible or visible system components for obvious damage or conditions which may cause the symptom. Intermittent Thoroughly inspect the wiring and connectors. An incomplete inspection of the wiring and connectors may result in misdiagnosis causing part replacement with the reappearance of the malfunction. If an intermittent malfunction exists, 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: Rear Window Defogger Malfunction Power Windows Malfunction Liftgate Window Release Inoperative