GMLAN Serial Data Line

WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

The GMLAN serial data communications circuit used on this vehicle is in a linear topology. The following modules are connected to the link, in order from DLC to the end of the linear configuration:

The following modules communicate on the GMLAN serial data circuit:

The engine control module (ECM) - 3.6L
The transmission control module (TCM) - 3.6L