Data Link Connector (DLC)

WARNING: This page is about a different car, the 2010 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.

The data link connector (DLC) is a standardized 16-cavity connector. Connector design and location is dictated by an industry wide standard, and is required to provide the following:

Scan tool power battery positive voltage at terminal 16
Scan tool power ground at terminal 4
Common signal ground at terminal 5
Low speed GMLAN serial data bus at terminal 1
High speed GMLAN serial data bus (+) at terminal 6
High speed GMLAN serial data bus (-) at terminal 14