Location of components
📄 Fuse box 22a in instrument panel
📄 Main unit, audio system (353)
📄 Connection, mobile telephone / Connector OnStar (375)
📄 Microphone, mobile phone (634)
📄 Head unit, audio/navigation (635)
📄 Crimp connection J43, instrument harness
📄 Crimp connection J160, instrument wiring harness