Reference Information
WARNING: This page is about a different car, the 2022 Cadillac CT5. However, it is still accessible from the selected car via links, so may be relevant.
Schematic Reference
Connector End View Reference
MASTER ELECTRICAL COMPONENT LIST or COMPONENT CONNECTOR END VIEWS - INDEX or INLINE HARNESS CONNECTOR END VIEWS - INDEX
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
Special Tools
EL-49903 GM OnStar Antenna Diagnostic Tool Kit