This rear main seal cover kit is designed to match the factory specifications and includes a gasket, installation hardware, and a rear main seal.It is compatible with vehicles equipped with 4.8L, 5.3L, 6.0L, and 6.2L engines.Part numbers: 635-518, 12633579, 12639250.Fits: Escalade (2002–2014), Escalade EXT (2002–2012), Escalade ESV (2003–2014); Avalanche (2002–2013), Camaro (1998–2002), Caprice (2011–2012), Corvette (1997–2012), Express 1500 (2003–2014), Express 2500/3500 (2003–2020), GTO (2004–2006), Impala (2006–2009), Monte Carlo (2006–2007), Silverado 1500 (1999–2013), Silverado 1500 HD/3500 (2001–2006), Silverado 2500 (1999–2004), Silverado 2500 HD (2001–2019), Silverado 3500 HD (2007–2019), Suburban 1500/Tahoe (2000–2014), Suburban 2500 (2000–2013), Trailblazer (2004–2009), Trailblazer EXT/SSR (2003–2006); Envoy XL (2003–2006), Envoy XUV (2004–2005), Savana 1500 (2003–2014), Savana 2500/3500 (2003–2020), Sierra 1500 (1999–2013), Sierra 1500 HD/3500 (2001–2006), Sierra 2500 (1999–2004), Sierra 2500 HD (2001–2019), Yukon/Yukon XL 1500 (2000–2014), Yukon XL 2500 (2000–2011); LaCrosse (2007–2009), Rainier (2004–2007), 9-7X (2005–2009); H2 (2003–2009), H3 (2008–2010), H3T (2009–2010); NPR/NPR-HD (2003–2016); G8 (2008–2009), Prix (2005–2008); W3500 Tiltmaster (2003–2009), W3500 Forward (2004–2008), W4500 Tiltmaster (2003–2010), W4500 Forward (2003–2010).Material: Metal.Color: Silver.Package includes: 1 x Rear Main Seal Cover Kit.