Visual/Physical Inspection
WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
- Turn Ignition key to the ON position and press any garage door opener (GDO) button. The LED should light when the unit has power and is functional.
- Inspect for aftermarket devices which could affect the operation of the GDO. 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.