Location of components
📄 Main fuse board 22a in the dashboard
📄 Main unit, audio system (353)
📄 Data link connector, 16-pin, CARB (445)
📄 Microphone, mobile phone (634)
📄 Head unit, audio/navigation (635)
📄 Control module, OnStar, VCIM (673)
📄 Crimp connection J43, instrument harness
📄 Crimp connection J87, instrument harness