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.
Exhausting low and reverse clutch (24) fluid is routed into the reverse clutch (23) circuit at the M1 shift valve, the reverse (22) circuit at the #7 accumulator check valve assembly, and on to the manual valve where it exhausts.