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 7 is used to communicate between P16 Instrument Panel Cluster Control Module and K56 Serial Data Gateway Module. This Ethernet harness consists of a single twisted copper pair of wires (circuits 7217 & 7216) from point to point.