Lube Boost Is Available
WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
Shift Solenoid 4
Shift solenoid 4 (Lube Boost) is commanded ON based on torque and temperature inputs to the HPCM. The shift solenoid 4 is energized ON, allowing line fluid to enter the solenoid 4 signal circuit. Solenoid 4 signal fluid is then routed through orifice #4 to the lube regulator valve elevating lube and motor cooling pressure and flow.