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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 82 (Interior Trim And Paneling) >> Diagnostic Information and Procedures >> DTC B1A57 >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.

For an overview of the component/system, refer to: OnStar Description and Operation (UI3) , or OnStar Description and Operation (UE1)

Component Description
A103 Roof Console Control switches and status LEDs for the OnStar system.
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