Fits:Bui-ck Rainier 5.3L 2004-2007,CTS 5.7L 6.0L 2004-2007,Chevy Silverado/GMC Sierra 1500 2500 1999-2008 4.8L 5.3L 6.0L.And many more shows in details. Replaces part number:12570427,12561820,264-965. Package Includes:1 x Valve cover,1 x Gasket, 4 x Bolts and 1 x Sealant. Feature:Made of high quality aluminum and rubber.Long durability and Good sealing.High oil consumption and low engine performance would disappear after installing. Easy to install:Just need to align in corresponding position then fix well. Fitment:Bui-ck Rainier 2004-2007 5.3LCa-di-llac CTS 2004-2007 5.7L 6.0LCa-di-llac Escalade 2002-2008 5.3L 6.0L 6.2LChevy Avalanche 2007-2008 5.3L 6.0LChevy Avalanche 1500 2002-2006 5.3LChevy Camaro 1999-2002 5.7LChevy Corvette 1999-2008 5.7L 6.0L 6.2LChevy Express/GMC Savana 1500 2003-2008 5.3LChevy Express/GMC Savana 2500 2003-2008 4.8L 5.3L 6.0LChevy Express/GMC Savana 3500 2003-2008 4.8L 5.3L 6.0LChevy Silverado/GMC Sierra 1500 1999-2008 4.8L 5.3L 6.0LChevy Silverado/GMC Sierra 1500 CLASSIC 2007 4.8L 5.3L 6.0LChevy Silverado/GMC Sierra 2500 1999-2008 5.3L 6.0LChevy Silverado/GMC Sierra 2500 CLASSIC 2007 6.0LChevy Silverado/GMC Sierra 3500 2001-2008 5.3L 6.0LChevy Silverado/GMC Sierra 3500 CLASSIC 2007 6.0LChevy SSR 2003-2006 5.3L 6.0LChevy Suburban/GMC Yukon XL 1500 2000-2008 5.3L 6.0LChevy Suburban/GMC Yukon XL 2500 2000-2008 6.0LChevy Tahoe/GMC Yukon 2000-2008 4.8L 5.3LChevy Trailblazer 2003-2008 5.3L 6.0LChevy W3500 Tiltmaster 2003-2008 6.0LChevy W4500 Tiltmaster 2003-2008 6.0LGMC Envoy 2003-2008 5.3LHum-mer H2 2003-2008 6.0L 6.2LHum-mer H3 2008 5.3LIsuzu Ascender 2003-2006 5.3LIsuzu NPR 2003-2008 6.0LIsuzu NPR-HD 2003-2008 6.0LPontiac Firebird 1999-2002 5.7LPontiac G8 2008-2009 6.0L 6.2LPontiac GTO 2004-2006 5.7L 6.0LSAAB 9-7X 2005-2008 5.3L 6.0LWorkhorse Fastrack FT1061 2004-2005 4.8LWorkhorse Fastrack FT1261 2005 4.8LWorkhorse Fastrack FT1461 2004-2005 4.8L 6.0LWorkhorse Fastrack FT1601 2004-2005 4.8LWorkhorse Fastrack FT1801 2004-2005 6.0LReplaces part number:12570427,12561820,264-965Package Includes:1 x Valve cover1 x Gasket4 x Bolts1 x Sealant