COMPATIBLE MODELS - Lifters fit 2010 for Cadillac Escalade, 2010 for Cadillac Escalade ESV, 2010 for Cadillac Escalade EXT, 2005-2010 for Chevy Silverado 1500, 2005-2007 for Chevy Silverado 1500 HD, 2007-2010 for Chevy Silverado 2500 HD, 2007 for Chevy Silverado 3500, 2005-2010 for GMC Sierra 1500, 2005-2007 for GMC Sierra 1500 HD, 2007-2010 for GMC Sierra 2500 HD, 2005-2010 for GMC Yukon, 2005-2010 for GMC Yukon XL 1500, 2005-2010 for GMC Yukon XL 2500. PART NUMBERS - 12569256,12571595,12639516,HL177,HL178,12619820,HT-2303. PRODUCT DETAILS - The hydraulic lifters contain a longer piston, which provides more load bearing surface and increases lifter longevity. In addition, the pushrod for Seat is made of a special powdered metal iron alloy that is heat-treated for strength and wear resistance. HIGHLY PERFORMANCE - Reduced noise and impact due to spacing, Reduced wear, lower engine noise and longer reliability. Hydraulic adjustment eliminates the need to adjust screws and nuts, and reduces engine noise..
