I took to Chevy dealer they could not find anything wrong. After a week they I pick my car back up from dealer and made a stop , when I went to start the car back up , it would not start. After 39 minutes It finally did start , just as tow truck came to tow. No one can find out what is wrong . PLEASE any help would be so appreciated . I am single parent and am concerned to go out on highway , or anywhere until I can get problem fixed.