I have a 2018 Chevy traverse 80,000 miles. This issue started probably about 3 to 4 months ago I would be sitting in at a red light and you could hear a tapping noise coming from the driver side of the car. I figured it was maybe something lose on the exhaust but we had just got back from a trip probably no more than 500 ml round trip. We got home and it was just sounded like a knock in the engine but coming from of the transmission area. I was wondering if anyone has had this issue also. Thanks.