2022 Equinox RS. The lift gate stopped working in cold weather, but now it does not work. I can hear the latch release and the motor engage, but it does not open. A similar issue occurs when the gate is open and I attempt to close it. One of many issues with this vehicle and may be related to a bad rear wire harness which would go along with backup camera issues. Is it a wire harness or motor? If a motor, where is it?