Visual/Physical Inspection

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Inspect for aftermarket devices which could 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.