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Home >> GMC >> 1995 >> Forward Control 7.4 N >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation - 4.3L. >> Self-Diagnostic System >> Serial Data

Serial Data

Control module has a serial data line. Serial data is a stream of electrical impulses which can be interpreted by special testers of other control modules. Access serial data by connecting special scan testers to Data Link Connector (DLC). Update intervals and information contained within data stream vary with model application.