Circuit/System Description
WARNING: This page is about a different car, the 2009 GMC Sierra and 2009 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The transmission contains two electric motor generators. The drive motor generators are cooled by the transmission fluid. Hot fluid exits the drive motor generator housing and flows to the transmission cooler supply line. The supply line connects to the cooler. From the cooler, the fluid returns through the oil cooler return line and enters the lubrication circuits. After lubricating the internal components, the fluid returns to the oil pan. A non-serviceable motor temperature sensor (MTS) is located in each drive motor generator assembly.