Yukon 2WD V8-5.7L VIN R (1997)
Data Link Connector: Description and Operation
Circuit Operation
A Scan Tool can be connected to the Data Link Connector (DLC), this allows the Scan Tool to communicate with the Diesel Powertrain Control Module
(PCM), Gasoline Vehicle Control Module (VCM), the Inflatable Restraint Control Module, or the Electronic Brake Control Module. System operations
can then be monitored for diagnostic purposes.