Note: W/ Reservoir; W/ Sensor; Bore: 1.125 In.; With Roll Pin Reservoir Retainer. For Chevrolet Silverado 1500 2006 Crew Cab Pickup With Vacuum Brake System; Except Hybrid. For Chevrolet Silverado 1500 2005 Crew Cab Pickup With RPO Code JF3; 68.4" Bed.