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Home >> Cadillac >> 2018 >> Escalade Base, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Data Communication System - Diagnostic Information And Procedures >> Diagnostic Information And Procedures >> DTC U0073 Or U2100: Control Module Communication Bus >> Circuit/System Description

Circuit/System Description

The serial data circuits are used to communicate information between the devices. The serial data circuits also connect directly to the data link connector (DLC).