Data Link Connector (DLC)
WARNING: This page is about a different car, the 2002 Pontiac Montana, 2002 Oldsmobile Silhouette, and 2002 Chevrolet Venture. However, it is still accessible from the selected car via links, so may be relevant.
The DLC connection is the central location for communicating with all modules that communicate using a serial data link. The DLC provides a power source and a standard connection for the scan tool.
Refer to Data Link Connector (DLC) Schematics .