{"product_id":"performance-head-gasket-kit-for-gmc-yukon-2002-2011-4-8l-5-3l","title":"Performance Head Gasket Kit for GMC Yukon (2002-2011) 4.8L 5.3L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHeavy-Duty Multi-Layer Steel Head Gasket Kit for 2002-2011 GMC Yukon (GMT800 \/ GMT900)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Performance Head Gasket Kit provides a high-tensile combustion seal and complete engine sealing overhaul for 2002-2011 GMC Yukon models equipped with GM Vortec small-block V8 engines to prevent coolant crossover and maintain peak cylinder compression.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock GMC Yukon Cylinder Head Sealing Limitation\u003c\/h3\u003e\n\u003cp\u003eFactory Gen III and Gen IV GM small-block V8 engines in the \u003cstrong\u003eGMT800\u003c\/strong\u003e and \u003cstrong\u003eGMT900\u003c\/strong\u003e Yukon platforms frequently encounter head gasket failure and external fluid weeping over high thermal cycles. OEM composite or standard-grade multi-layer gaskets suffer from localized bore scrub and thermal distortion between the cast-iron engine block and cast-aluminum cylinder heads. Over extended heat cycles, cyclic expansion rates cause the fire ring seal to degrade, leading to combustion pressure entering the cooling jackets, scorched exhaust ports, and valley cover vacuum leaks that trigger unmetered air draw and engine misfires.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis master engine overhaul kit utilizes premium \u003cstrong\u003eMulti-Layer Steel (MLS)\u003c\/strong\u003e cylinder head gaskets engineered to maintain uniform clamping loads under high cylinder pressures. The embossed outer spring-steel layers are coated with a high-temperature fluoroelastomer (Viton) to guarantee micro-sealing across uneven deck surfaces, preventing fluid migration under severe thermal shock. The complete kit integrates heavy-duty fluoroelastomer valve stem seals, reinforced intake and exhaust manifold gaskets, and high-durometer oil pan and valley cover seals designed to withstand high crankcase pressures and resist petroleum degradation across harsh duty cycles.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2 Multi-Layer Steel (MLS) Head Gaskets\u003c\/li\u003e\n  \u003cli\u003e1 Rear Crankshaft Gasket Seal\u003c\/li\u003e\n  \u003cli\u003e1 Engine Oil Pan Gasket\u003c\/li\u003e\n  \u003cli\u003e1 Valley Cover Gasket\u003c\/li\u003e\n  \u003cli\u003eIntake Manifold Gaskets\u003c\/li\u003e\n  \u003cli\u003eExhaust Manifold Gaskets\u003c\/li\u003e\n  \u003cli\u003eKnock Sensor Grommets\u003c\/li\u003e\n  \u003cli\u003eDamping Plug Heads\u003c\/li\u003e\n  \u003cli\u003eValve Stem Seals\u003c\/li\u003e\n  \u003cli\u003eFiber Base Plates\u003c\/li\u003e\n  \u003cli\u003eAssorted O-rings and Secondary Gaskets\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; min-width: 300px;\"\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2002-2011 GMC Yukon\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eGM Vortec 4.8L (LR4\/LY2\/L20), 5.3L (LM7\/L59\/LM4\/L33\/LY5\/LMG\/LC9) \/ GMT800, GMT900\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e275-320 hp \/ 290-340 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eCS9284, HS26191PT, HS26190PT-2, HS26191PT-1, HGS3168, ES72220, GS33449, HSGM10448L, LGS3165, MIS16340\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2002-2011 GMC Yukon 4.8L OHV V8 (SLE)\u003c\/li\u003e\n  \u003cli\u003e2002-2011 GMC Yukon 5.3L OHV V8 (SLE, SLT)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the GMT800 and GMT900 Yukon?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2002-2011 GMC Yukon equipped with the GM Vortec \u003cstrong\u003e4.8L\u003c\/strong\u003e and \u003cstrong\u003e5.3L\u003c\/strong\u003e small-block V8 engines; verify your VIN displacement code prior to installation, as piston rings are not included.\u003c\/p\u003e\n\n\u003ch4\u003eAre new cylinder head bolts or piston rings supplied in this set?\u003c\/h4\u003e\n\u003cp\u003eNo, this package includes a full engine sealing gasket set only; torque-to-yield (TTY) cylinder head bolts and piston rings must be sourced separately.\u003c\/p\u003e\n\n\u003ch3\u003eThe GMC Heavy-Duty Caliber\u003c\/h3\u003e\n\u003cp\u003eBuilt for the punishing demands of full-size towing and continuous payload duty, this engine overhaul sealing system restores commercial-grade reliability to your powertrain, ensuring zero blow-by and leak-free performance under extreme grade-climbing and haul conditions.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67551501418744,"sku":"DS-E9GO62OQF","price":89.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/performance-head-gasket-kit-for-gmc-yukon-2002-2011-4-8l-5-3l-1.jpg?v=1790797723","url":"https:\/\/performancechiptuning.com\/de\/products\/performance-head-gasket-kit-for-gmc-yukon-2002-2011-4-8l-5-3l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}