Reference Information

Schematic Reference

• OnStar/Telematics Schematics
• Radio/Navigation System Schematics (IO5/IO6)Radio/Navigation System Schematics (IOS/IOT)

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

• OnStar Description and Operation (UE1 without IOS/IOT)OnStar Description and Operation (UI3)OnStar Description and Operation (UE1 with IOS/IOT)
• Radio/Audio System Description and Operation (IO5/IO6)Radio/Audio System Description and Operation (IOS/IOT)

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Special Tools

EL-49903  OnStar Antenna Diagnostic Tool Kit