For 1990-2009 cars only
Symptoms - Roof for GMC Truck Yukon - 2WD 2003
Important: If the suspected cause of an inoperative sunroof is a power interruption to the sunroof module, the sunroof must be re-initialized. Refer to Sunroof Motor/Actuator Synchronization .
Important: The following must be completed before using the symptom tables.
- Perform Diagnostic Starting Point - Roof in order to verify that all of the following are true:
- Review the system operation in order to familiarize yourself with the system functions. Refer to Sunroof Description and Operation .
| • | There are no DTCs set. |
| • | The control module(s) can communicate via the serial data link. |
Visual/Physical Inspection
| • | Inspect for aftermarket devices which could affect the operation of the Power Sunroof system. Refer to Checking Aftermarket Accessories in Wiring Systems. |
| • | 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 in Wiring Systems.
Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:
| • | Retained Accessory Power (RAP) On After Timeout in Retained Accessory Power, if the power sunroof should operate longer than 20 minutes after the ignition has been turned OFF |
