Originally Posted by Halfcent
I would like to expand the thread by asking which of the listed cars uses the GM CAN bus? I know not all of the Cobalts do.
All Cobalt's use CAN (GM LAN) to some extent.
A 2.2 or 2.4 Cobalt uses both GM LAN High Speed and Low Speed bus networks.
The 2.0 LSJ also has GM LAN however the P12 PCM is "primarily" Class 2 (J1850 VPW) for items such as service programming as well as diagnostics and and scan tool interface. But the LSJ PCM is still connected to the GM LAN network (High Speed) to provide certain multi-plexed feature functionality such as Theft Deterrant. Items such as radio and the IP Cluster on the Low Speed GM LAN network.
PS>LNF Engine Managment is actually Bosch MED9.6
Here's a schmatic showing the HS GM LAN for the 2005 Cobalt