Kit Includes: 2X Front Drilled Brake Rotors - S-55054 2X Rear Drilled Brake Rotors - S-55066 2X Front Ceramic Brake Pads - P-785 2X Rear Ceramic Brake Pads - P-792 1X Rear Disc Brake Caliper - Driver Side - 18B4854 1X Rear Disc Brake Caliper - Passenger Side - 18B4855 Fitment: **For Models With 12.00 Inch (305Mm) Front And 12.78 Inch (325Mm) Rear Rotors** Replacement For 2003 Chevrolet Silverado 1500 (2 Wheel Steering; Single Piston Caliper; With Rpo Code Jc3 (Vacuum Power, 4 Wheel Disc, 6400Lb)) Replacement For 2003 Chevrolet Silverado 1500 (Quadrasteer - Extended Cab Pickup; Single Piston Caliper; With Rpo Code Jc3 (Vacuum Power, 4 Wheel Disc, 6400Lb)) Replacement For 2004 Chevrolet Silverado 1500 (Standard Cab Pickup; Single Piston Caliper; With Rpo Code Jh1 (Hydraulic Power, 4 Wheel Disc, 6400Lb); With Rpo Code Jc3 (Vacuum Power, 4 Wheel Disc, 6400Lb)) Replacement For 2004 Chevrolet Silverado 1500 (Hybrid; Single Piston Caliper; With Rpo Code Jh1 (Hydraulic Power, 4 Wheel Disc, 6400Lb); With Rpo Code Jc3 (Vacuum Power, 4 Wheel Disc, 6400Lb)) Replacement For 2004 Chevrolet Silverado 1500 (Base, Ls, Lt, Wt; Standard Duty; 2 Wheel Steering; Extended Cab Pickup; Single Piston Caliper; With Rpo Code Jh1 (Hydraulic Power, 4 Wheel Disc, 6400Lb); With Rpo Code Jc3 (Vacuum Power, 4 Wheel Disc, 6400Lb)) Replacement For 2005 Chevrolet Silverado 1500 (Hybrid; Not For Rear Drum; Single Piston Caliper; Rwd - Excluding Limited Slip Differential; 4Wd; With Rpo Code Jh1 (Hydraulic Power, 4 Wheel Disc, 6400Lb); With Rpo Code Jc3 (Vacuum Power, 4 Wheel Disc, 6400Lb)) Replacement For 2006 Chevrolet Silverado 1500 (Ss, Hybrid Models; Not For Rear Drum; Single Piston Caliper; With Rpo Code Jh1 (Hydraulic Power, 4 Wheel Disc, 6400Lb)) Replacement For 2003 Gmc Sierra 1500 (Single Piston Caliper; With Rpo Code Jc3(Vacuum Power, 4 Wheel Disc, 6400Lb) Replacement For 2004 Gmc Sierra 1500 (Single Piston Caliper; With Rpo Code Jh1 (Hydraulic Power, 4 Wheel Disc, 6400Lb); With Rpo Code Jc3 (Vacuum Power, 4 Wheel Disc, 6400Lb)) Replacement For 2005 Gmc Sierra 1500 (Hybrid Models Only; Rwd - Excluding Limited Slip Differential; 4Wd; Single Piston Caliper; With Rpo Code Jh1 (Hydraulic Power, 4 Wheel Disc, 6400Lb); With Rpo Code Jc3 (Vacuum Power, 4 Wheel Disc, 6400Lb)) Replacement For 2005 Gmc Sierra 1500 ( Denali Models Only; 4Wd; Single Piston Caliper; With Rpo Code Jh1 (Hydraulic Power, 4 Wheel Disc, 6400Lb); With Rpo Code Jc3 (Vacuum Power, 4 Wheel Disc, 6400Lb)) Replacement For 2006 Gmc Sierra 1500 ( Denali, Hybrid Models Only; Single Piston Caliper; With Rpo Code Jh1 (Hydraulic Power, 4 Wheel Disc, 6400Lb))