Reference Information
WARNING: This page is about a different car, the 2018 GMC Terrain and 2018 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
Schematic Reference
- OnStar/Telematics Wiring Schematics
- Radio/Navigation System Wiring Schematics (IOB)Radio/Navigation System Wiring Schematics (IOR)Radio/Navigation System Wiring Schematics (IOS/IOT/IOU)
Connector End View Reference
COMPONENT CONNECTOR END VIEWS - INDEX
Description and Operation
- OnStar Description and Operation (UE1 without IOU/IOT/IOR)OnStar Description and Operation (UE1 with IOU/IOT/IOR)
- Radio/Audio System Description and Operation (IOB)Radio/Audio System Description and Operation (IOS/IOT/IOU)Radio/Audio System Description and Operation (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 OnStar Antenna Diagnostic Tool Kit