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Home >> GMC >> 1987 >> Forward Control 6.2 J, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 13 (Engine Controls - Theory & Operation - Gasoline) >> Self-Diagnostic System >> Serial Data

Serial Data

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 1994 GMC Yukon, 1994 GMC Suburban, 1994 GMC Pickup, 1994 GMC Cab & Chassis, and 1994 GMC C3500 HD. However, it is still accessible from the selected car via links, so may be relevant.

PCM 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.

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