K 1500 Truck 4WD V8-6.0L VIN U (2001)
Information Bus: Description and Operation
The Class 2 serial data link allows modules to transmit, receive, or exchange data between each other:
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HVAC module
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Suspension Control Module (SCM)
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Active Transfer Case (ATC)
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Electronic Brake Control Module (EBCM)
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Powertrain Control Module (PCM)
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Transmission Control Module (TCM)
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Vehicle Interface Unit (VIU)
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Body Control Module (BCM)
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Instrument Panel Cluster (IPC)
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Driver Information Center (DIC)
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Mirror Memory Module (MMM)
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Memory Seat Module (MSM)
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inflatable restraint Sensing And Diagnostic Module (SDM)
The Class 2 serial data link allows a scan tool to communicate with these modules for testing purposes, checking for DTCs, and to
activate/enable/disable functions. These communication circuits are bussed together via a star connector which ensures continuity between the Class 2
communication circuits.
The DLC has a ground for the serial data signal exiting the scan tool.
The scan tool is also supplied battery positive voltage and ground at the DLC.