Hybrid Low, 1-2 Clutch Regulator Valve
WARNING: This page is about a different car, the 2010 GMC Sierra and 2010 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
PCS 3 signal fluid, at the hybrid low, 1-2 clutch regulator valve, opposes hybrid low, 1-2 clutch regulator valve spring force and HL 12 clutch/4th clutch feedback fluid pressure to regulate line or auxiliary line pressure into the HL 12 clutch/4th clutch feed circuit.