2011 Equinox has made loud engine noise twice in 2 weeks. It was not a double start as the car was not already started. Neither time the engine was not really cold. The noise was very loud and I shut the engine off and it seemed to be coming maybe from the passenger side of the engine. The dealer could not replicate or find any issues or bulletins for this noise. Has anyone else experienced this type of loud noise or any suggestions would be very helpful
