Class 2 Serial Data Link

The class 2 serial data link allows the following modules to communicate and share data with each other:

• Auxiliary power drop connector
• Body control module (BCM)
• Digital radio receiver (U2K or U2L)
• Driver information center (DIC)
• Electronic brake control module (EBCM)
• Instrument panel cluster (IPC)
• OnStar module (UE1)
• Powertrain control module (PCM)
• Radio
• Inflatable restraint sensing and diagnostic module (SDM)

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