SGCM Cooling System Components: SGCM
WARNING: This page is about a different car, the 2005 GMC Sierra and 2005 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The starter/generator control module (SGCM) is a GMLAN device. The SGCM monitors 3 coolant temperature sensors that are mounted in the coolant stream, 4 coolant level sensors that are mounted in the electronics coolant of the SGCM, the SGCM coolant pump relay control circuit, and the SGCM coolant fan relay control circuit to maintain its internal cooling requirements. Internal to the SGCM are the electronics that control the system voltage, these electronic components are immersed in a coolant. This coolant is not the coolant that is circulated though the coolant circuit, the coolant helps evenly distribute the heat of the electronics and are monitored by the 4 coolant level sensors.