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Reference Information

WARNING: This page is about a different car, the 2020 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.

Schematic Reference

OnStar/Telematics Wiring Schematics 

Connector End View Reference

Master Electrical Component List &Component Connector End Views - Index

Description and Operation

OnStar Description and Operation (UI3) OnStar Description and Operation (UE1) 

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information