Tl* the contact owns a 2012 chevrolet sonic ls. the contact stated that while sitting on an incline, the hill holder was engaged yet the vehicle rolled away in reverse. on a separate occasion while driving 45 mph, the brakes started to squeal after being depressed. the vehicle was taken to the dealer for both failures. the dealer confirmed there was corrosion along the rear brakes. the vehicle was taken to the dealer and the manufacturer was contacted. the vehicle was not repaired. the failure mileage was 925 and the current mileage was 1041. updated 04/25/12*lj the consumer stated the transmission would not shift into gear. updated 04/30/12