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.
- Inspect for aftermarket devices that could affect the operation of the serial data communications systems. Refer to CHECKING AFTERMARKET ACCESSORIES in Wiring Systems.
- Inspect the easily accessible systems or visible system components for obvious damage or conditions that could cause the symptom.