Diagnostic Aids
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Prior to performing sunroof system circuit diagnosis, perform the Sunroof Motor/Actuator Initialization/Teach Process (Crew Cab Existing Motor) or Sunroof Motor/Actuator Initialization/Teach Process (Extended Cab New Motor) or Sunroof Motor/Actuator Initialization/Teach Process (Extended Cab Existing Motor) or Sunroof Motor/Actuator Initialization/Teach Process (Crew Cab New Motor) .