Circuit Description
WARNING: This page is about a different car, the 2000 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
DLC is provided to allow scan tool to communicate with SDM. DLC provides power and ground circuits for scan tool. SDM communicates serial data through circuit 1128 to scan tool. DLC allows scan tool to access data list information, read and clear diagnostic trouble codes.