GMPartsGiant.com offers the wholesale prices for genuine 2021 Chevrolet Traverse AWD parts. Parts like Automatic Transmission Park System are shipped directly from authorized GM dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 3.6L. Model Code: LS EXTENDED 4 DOOR SUV, LT EXTENDED 4 DOOR SUV, LTZ EXTENDED 4 DOOR SUV.