4Pcs Valve Lifters Fit Gm 5.3L/6.0L/6.2L Active Fuel Management Afm Dod

100% Brand New Items, Never Used Or Installed ?Replace part number For reference : HT-2303,12569256, 12571595, 12639516, 12645725,12619820,HL177, HL178, HL7011S High quality You must order 2 if a full set is needed. Professional installation in highly recommended (No instruction included)?? Note: Due to the transportation process, the AFM Lifters are not filled with oil or not filled with much oil.You need to fill them yourself or ask a professional for help.After oil filling and installation, let it idle for 20 minutes first. If there is noise in the process, it doesn't matter. There will be no noise after 20 minutes. If you have any problems, please feel free to contact us. ? Package Includes 4 pcs Lifters Fitment ?Buick: Allure 2008-2009 Lacrosse 2008-2009 Rainier 2005-2007 Cadillac: Escalade 2007-2012 Chevy: Avalanche 2007-2013 Camaro 2010-2012 Caprice 2011-2013 Impala 2006-2009 Monte Carlo 2006-2007 Silverado 1500 2007-2013 Suburban 2007-2013 Tahoe 2007-2013 Trailblazer 2005-2008 GMC: Envoy 2005-2009 Sierra 1500 2007-2013 Yukon 2007-2013 Yukon Denali 2007-2008, 2010-2012 Pontiac: G8 2008-2009 Grand Prix 2006-2008 Saab: 9-7X 2006-2009