GMPartsGiant.com offers the wholesale prices for genuine 2016 Chevrolet Sonic Hatchback parts. Parts like Seat Assembly/Rear-Back Detail are shipped directly from authorized GM dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 4 Cyl 1.4L, 4 Cyl 1.8L. Model Code: LS 5 DOOR HATCHBACK, LT 5 DOOR HATCHBACK, LTZ 5 DOOR HATCHBACK, RS 5 DOOR HATCHBACK.