Within the last week, I have been getting an intermittent popping sound coming from the right rear of my 2013 Volt, but ONLY when stopped. My wife noticed it too. She got out of the front passenger seat and started walking to the rear of the car and she said it sounded as if she hit the car, but she was a few feet away from the rear of the car when she heard the pop. My son and I heard it and he asked me what that popping sound was.
Anyone else experience this?