1-2, 2-3, Reverse Shift Solenoid (SS) Valve Assembly (S3):
WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
Drive (19) fluid passes through orifice #24 into the S3 signal (16) fluid circuit in preparation for a shift. The normally closed 1-2, 2-3, reverse SS valve assembly is energized (ON), allowing any fluid pressure in the S3 signal (16) fluid circuit to exhaust through the solenoid.
IMPORTANT:
Power flow for Intermediate Range - Third Gear is exactly the same as Drive Range - Third Gear.