Reference Information (Communication Interface Module)

Schematic Reference 

OnStar Schematics 

Connector End View Reference 

Component Connector End Views

Description and Operation 

OnStar Description and Operation 

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