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Home >> Chevrolet >> 1994 >> C 2500 Suburban 2WD V8-454 7.4L >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Data Link Connector >> Description and Operation
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Data Link Connector: Description and Operation

ALDL Connector:






Purpose
The Data Link Connector (DLC) provides a means of communicating with the control module concerning engine and transmission operating parameters and accessing Diagnostic Trouble Codes (DTC).

Operation
The control module communicates a variety of information through the Serial Data Line (DLC terminal "M"). The data is transmitted at a high frequency which requires a Tech 1 diagnostic computer (scan) tool for interpretation. There are several other non-OEM scan tools available for displaying the same information.


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