M1 Shift Valve
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.
At the M1 shift valve exhausting direct clutch fluid passes from the direct clutch feed 2 (28) fluid circuit into the direct clutch feed 1 (27) fluid circuit and continues on to the shift pressure relay valve.