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 transmission control module (TCM) continuously monitors the ignition accessory voltage circuit. A low ignition accessory voltage reading at the TCM will cause DTC P2536 to set.