Replace the motor in my 08 trailblazer about 8 months ago. Recently I had a taillight short and since then I have no power to accelerate from a stop. When you start the vehicle it seems fine but once you put it into drive or reverse it makes an awful vibration. I replaced the throttle body and sensor. I’m not sure if it’s an electric issue with a sensor, transmission issue or what. It does not have any codes.