GMLAN Serial Data Line

WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. 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 transmission control module (TCM), (LY7) 3.6-L
The engine control module (ECM), (LY7) 3.6-L