Circuit/System Description
WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
The Ethernet bus 2 is used to communicate between K56 Serial Data Gateway Module and A11 Radio. This Ethernet harness consists of a single twisted copper pair of wires (circuits 4757 & 4758) from point to point.