Karianne, please post if the dealership is able to find the problem. We have had our 2015 Trax in multiple time for weeks at a time and they could never replicate the smell so this last time we had it in they kept it for 6 weeks and still could not find it. GM was called and they said that if they could not replicate the smell then there was nothing else that they could do. I love my Trax!! I just want them to find the problem so I don't have to worry about something bad happening when I start my car.