Shift Solenoid Valve - Mode A
WARNING: This page is about a different car, the 2009 GMC Sierra and 2009 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Shift solenoid valve - mode A spring force moves the shift solenoid valve - mode A to the released position, allowing HD 234 clutch supply fluid pressure to exhaust through the valve into the backfill circuit.