Reference Information

Schematic Reference

• OnStar/Telematics Schematics (Encore) , OnStar/Telematics Schematics (Trax) 
• Radio/Navigation System Schematics (Encore) , Radio/Navigation System Schematics (Trax) 

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCOREWIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX

Description and Operation

• OnStar Description and Operation 
• Radio/Audio System Description and Operation (with Monochrome Display) , Radio/Audio System Description and Operation (with Color Display) 

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