GMPartsGiant.com offers the wholesale prices for genuine 2018 Chevrolet Trax 2WD parts. Parts like Brake Booster 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 4 DOOR SPORT UTILITY, LT 4 DOOR SPORT UTILITY, LTZ 4 DOOR SPORT UTILITY.