The shutoff feature that shuts the engine? down while at a full stop/red light, is defective. I was stopped at a red-light and the engine shutdown as a gas-saver feature and stalled and I had to put my car in park and restart it in mid traffic. I was rear-ended by the person behind me, who was a hit n run. This is an unsafe feature that has been put in many Chevrolet vehicles. I called the Chevrolet # and she told me, I had to pay for the $250 diagnostic test at a Chevy dealership and I told her, Chevrolet should be responsible for the failure to restart my engine car as it is a an unsafe feature installed by them and that that they should turn off that feature for free as I was hit from behind when the vehicle did not restart. I want Chevrolet to pay to have this unsafe feature removed without charging my for an expensive diagnostic system test. I as a consumer, should have that choice! I want that flawed feature turned off in my vehicle. IT'S UNSAFE.