Class 2 Serial Data Link

The class 2 serial data link allows the following modules to communicate and share data with each other:
^ Powertrain Control Module (PCM)
^ Inflatable restraint Sensing And Diagnostic Module (SDM)
^ Electronic Brake Control Module (EBCM)
^ Instrument Cluster (IPC)
^ Heater-A/C Control (W/CJ2)
^ Body Control Module (BCM) Radio
^ OnStar

The class 2 serial data link allows a scan tool to communicate with the above modules for diagnostic and testing purposes.

For a description of the RPO Code(s) shown in this article or any of the images therein, refer to the RPO Code List found at Vehicle/Application RPO Codes