Park - Engine Running (Hydraulic Circuits): Notes
WARNING: This page is about a different car, the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Cadillac Escalade ESV, and 2018 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
When the gear selector is in the Park (P) position, the shift solenoids 1, 2 and 4 are commanded ON and the following changes occur in the transmission's hydraulic and electrical systems: