[Vehicle Fitment-1]: Compatible with Chevrolet Silverado 1500 2004 (with Single Piston Caliper), Silverado 1500 2005 (RWD; without Limited Slip Differential), Silverado 1500 2005 (4WD), Silverado 1500 2006, Silverado 1500 Classic 2007; Compatible with GMC Sierra 1500 2004 (with Single Piston Caliper), Sierra 1500 2005 (RWD; without Limited Slip Differential), Sierra 1500 2005 (4WD), Sierra 1500 2006, Sierra 1500 Classic 2007 ---It fits the model with Brake Code JH1 [Vehicle Fitment-2]: Compatible with Chevrolet Silverado 1500 2003-2004 (with Single Piston Caliper), Silverado 1500 2005 (4WD), Silverado 1500 2005 (RWD; without Limited Slip Differential); Compatible with GMC Sierra 1500 2003-2004 (with Single Piston Caliper), Sierra 1500 2005 (4WD), Sierra 1500 2005 (RWD; without Limited Slip Differential) ---It fits the model with Brake Code JC3; GM Brake Codes are on the "Service Parts Identification" Sticker [Vehicle Fitment-3]: Compatible with Cadillac DeVille 2003-2005, DTS 2006-2011 ---It fits the model GM Brake Code J55; with 8 Stud Rotor; GM Brake Codes are on the "Service Parts Identification" Sticker [Specification & Reference Number]: ①Inlet Port Size: M10x1.0; ②Bleeder Port Size: M10x1.0; ③Piston Diameter: 2.129 inch; ④Brake Caliper Type: 1 Phenolic Piston; 18048079, 19133272, 18-B4854, 18-P4854, SLB1828 [Buy with Confidence]: A-Premium offers a one-year unlimited-mileage guarantee on our meticulously crafted disc brake caliper. We offer a wide variety of automotive accessory categories, ensuring that you can hit the road with peace of mind.