The engine rang after the Cruze hot car released the throttle.

This happens on Cruze models equipped with automatic transmission. When the engine speed decreases after the throttle, torque converter and gear in the gearbox decelerate, the oil pressure in the gearbox drops and flows back under the action of inertia, and the gearbox will whistle. This kind of sound is more or less found in automatic transmission models, not a fault, but a normal phenomenon. Please feel free to use your car. It has nothing to do with the engine. I hope I can help you. Have a nice day.