[Vehicle Fitment]: Compatible with 2003-2004 2006 Chevrolet Silverado 1500, 2003-2004 2006 GMC Sierra 1500, 2005 Chevrolet Silverado 1500 5.3L, 2007 Chevrolet Silverado 1500 Classic, 2006-2011 Cadillac DTS, 2005 GMC Sierra 1500 5.3L, 2003-2005 Cadillac DeVille, 2005 Chevrolet Silverado 1500 4.3L, 2005 Chevrolet Silverado 1500 4.8L, 2007 GMC Sierra 1500 Classic, 2005 GMC Sierra 1500 4.8L, 2005 GMC Sierra 1500 4.3L, 2005 Chevrolet Silverado 1500 6.0L, 2005 GMC Sierra 1500 6.0L---Rear Left and Right(Driver and Passenger) Side [Reference Number]: 18048079, 18048080, 19133272, 19133273, 18-B4854, 18-B4855, 18-P4854, 18-P4855, SLB1828 [Specification]: Inlet Port Size: M10 x 1.0; OD Piston Size: 2.129 inches; Brake Piston Count: 1 Piston; Bleeder Port Size: M10 x 1.0; The Brake Calipers are coated with antirust coating, which can effectively prolong the service life [Kit Includes]: 2x Rear Disc Brake Calipers [Directly Fit]: OE Replacement Brand New Brake Caliper Assembly, including Brake Caliper, Bracket, Phenolic Piston, Installation Hardware. Please enter your vehicle information in the top left corner of listing and check our "Special Note" before ordering