Class 2 Serial Data Line

The class 2 serial data line on this vehicle is a combination star-linear configuration, where the body control module (BCM) is connected to multiple modules. Refer to Data Link Connector (DLC) Schematics  for schematics. The following modules communicate on class 2 bus:

• The BCM
• The electronic brake control module (EBCM)
• The inflatable restraint sensing and diagnostic module (SDM)
• The instrument panel cluster (IPC)
• The powertrain control module (PCM)
• The radio
• The rear seat entertainment (RSE) assembly
• The transfer case shift control module (TCSCM)
• The vehicle communication interface module (VCIM) (OnStar®)