Pressure Control (PC) Solenoid Valve
WARNING: This page is about a different car, the 2009 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
The Pressure Control (PC) Solenoid Valve is controlled by the PCM. This valve regulates the filtered actuator feed pressure which enters the torque signal circuit. Torque signal fluid is then routed to the pressure regulator valve, the 1-2 & 3-4 accumulator valve, and the 2-3 accumulator valve.