Circuit/System Description
WARNING: This page is about a different car, the 2018 Chevrolet Sonic. However, it is still accessible from the selected car via links, so may be relevant.
The gateway isolated low speed GMLAN serial data bus is used to communicate information between the devices. The serial data is transmitted over a single wire (circuit number 1102) to the appropriate devices. The K56 Serial Data Gateway Module acts as the gateway module between devices on low speed GMLAN bus and devices on gateway isolated low speed GMLAN bus.