Circuit/System Description
WARNING: This page is about a different car, the 2009 Pontiac Torrent and 2009 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
The body control module (BCM) controls the IGN MAIN relay 31 by applying voltage to the circuit. The IGN MAIN relay 31 is energized when the ignition switch is in RUN or START, or when a remote start is requested.