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 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