Reference Information

Schematic Reference

OnStar/Telematics Wiring Schematics (Chevrolet)OnStar/Telematics Wiring Schematics (Buick)

Connector End View Reference

Master Electrical Component List (Buick)Master Electrical Component List (Chevrolet)

Description and Operation

OnStar Description and Operation (UE1 without IOR)OnStar Description and Operation (UE1 with IOR)

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-49903-1  Test Antenna Navn-Cell Comn