[Vehicle Fitment]: Compatible with Astro/Safari 2003-2005, Avalanche 1500 2002-2006, Express 1500 2003-2008, Express 2500 2003-2005, Silverado 1500 1999-2006, Silverado 1500 Classic 2007, Suburban 1500 2000-2006, Tahoe 2000-2006, Escalade/Escalade EXT 2002-2006, Escalade ESV 2003-2006; GMC Safari/Savana 1500/Savana 2500 2003-2005, Sierra 1500 1999-2006, Sierra 1500 Classic 2007, Yukon/Yukon XL 1500 2002-2006---Front Left, Driver Side [Vehicle Fitment]: Compatible with Silverado 2500 2002, Silverado 2500 HD 2001-2010(Classic 2007), Silverado 3500 2004-2006, Silverado 3500 Classic 2007, Silverado 3500 HD 2010, Suburban 2500 2007-2013, Sierra 2500 HD 2001-2010(Classic 2007), Sierra 3500 2004-2006, Sierra 3500 Classic 2007, Sierra 3500 HD 2007-2009, H2 2003-2008---Rear Right, Passenger Side [Reference Number]: 18040100, 25848001, 18040101, 18-B4729, 18-P4729, 18-4729 [Specification]: Inlet Port Size: 0.39; OD Piston Size: 2.00 inches; Brake Piston Count: 2 Piston; Bleeder Port Size: M10 x 1.5; The Brake Calipers are coated with antirust coating, which can effectively prolong the service life [Purchase Tip]: Please enter your vehicle information in the top left corner of the listing to make sure the caliper fits your car. (Pay attention to specific details, such as heavy-duty, 4WD, 2WD, AWD, and 4WD).