Reference Information

Schematic Reference

OnStar/Telematics Wiring Schematics 

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) 

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