Drive Range, Sixth Gear (Hydraulic Circuits Without ETRS): Notes
WARNING: This page is about a different car, the 2020 GMC Terrain and 2020 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
As the vehicle speed increases, the transmission control module (TCM) receives input signals from the automatic transmission input and output speed sensors, the throttle position sensor and other vehicle sensors to determine the precise moment to command OFF the 1 rev & 6789 solenoid. At the same time the 5-7 reverse solenoid is commanded OFF.