GMPartsGiant.com offers the wholesale prices for genuine 2009 Chevrolet Trailblazer 2WD exc SS parts. Parts like Brake Caliper Mounting/Front & Knuckle are shipped directly from authorized GM dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 4.2L, 8 Cyl 5.3L. Model Code: 4 DOOR.