635-518 Rear Main Seal Kit 4.8 5.3 6.0 6.2 Replacement for Chevy GMC 12633579 12639250

Part number: 635-518, 126335791, 2639250 Replacement for 2012-2013 Chevy Tahoe and Chevy Suburban 1500; Replacement for 2013 Chevy Silverado 1500; Replacement for 2012 Chevy Express 1500; Replacement for 2014 Chevy Silverado 2500 HD and Chevy Express 2500; Replacement for 2012 2013 2014 2018 Chevy Express 3500 Replacement for 2012 Chevy Avalanche and Cadillac Escalade ESV; Replacement for 2013 GMC Yukon and Sierra 1500; Replacement for 2015 GMC Sierra 2500 HD; Replacement for 2012 2014 2015 GMC Savana 3500 The rear main seal cover kit includes a new gasket, installation hardware, and an updated seal design for superior leak prevention Warning: Before fixing the mounting screws, make sure that the timing cover body and the flange shaft are in the same center, and then fix the mounting screws!!!!