{"product_id":"performance-head-gasket-kit-for-gmc-sierra-2002-2011-4-8l-5-3l","title":"Performance Head Gasket Kit for GMC Sierra (2002-2011) 4.8L 5.3L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eMulti-Layer Steel Engine Head Gasket Kit for 2002-2011 GMC Sierra (GMT800 \/ GMT900)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Multi-Layer Steel Head Gasket Kit replaces degraded factory seals on the 2002-2011 GMC Sierra to restore high-pressure combustion sealing, prevent coolant crossover, and eliminate vacuum leaks across the cylinder heads and crankcase.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock GMC Sierra Cylinder Sealing Failure\u003c\/h3\u003e\n\u003cp\u003eFactory GM Gen III and Gen IV small block engines—including the \u003cstrong\u003eVortec 4800\u003c\/strong\u003e and \u003cstrong\u003eVortec 5300\u003c\/strong\u003e—are prone to gasket degradation due to differential thermal expansion between cast iron engine blocks and aluminum cylinder heads. Over continuous thermal cycles and heavy towing loads, factory composite gaskets experience shear stress, causing fire ring distortion, localized coolant burn, and oil migration. Additionally, aging perimeter seals and intake gaskets harden, allowing unmetered air into the intake runners and triggering persistent lean codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive overhaul kit integrates premium \u003cstrong\u003eMulti-Layer Steel (MLS)\u003c\/strong\u003e cylinder head gaskets engineered to withstand elevated peak cylinder pressures and continuous shear stress. The high-grade spring steel layers feature specialized elastomer coatings to ensure micro-sealing across deck surfaces without weeping. Accompanying fluoropolymer and Viton valve stem seals withstand severe exhaust gas temperatures, while precision-molded perimeter gaskets for the valley cover, oil pan, and timing assembly maintain positive crankcase vacuum and stop fluid egress under severe operating conditions.\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 Sierra 1500\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;\"\u003e4.8L, 5.3L V8 (Vortec) \/ \u003cstrong\u003eGMT800\u003c\/strong\u003e, \u003cstrong\u003eGMT900\u003c\/strong\u003e\n\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;\"\u003e270-326 hp \/ 285-350 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;\"\u003e\n\u003cstrong\u003eCS9284\u003c\/strong\u003e, \u003cstrong\u003eHS26191PT\u003c\/strong\u003e, \u003cstrong\u003eHS26190PT-2\u003c\/strong\u003e, \u003cstrong\u003eHS26191PT-1\u003c\/strong\u003e, \u003cstrong\u003eHGS3168\u003c\/strong\u003e, \u003cstrong\u003eES72220\u003c\/strong\u003e, \u003cstrong\u003eGS33449\u003c\/strong\u003e, \u003cstrong\u003eHSGM10448L\u003c\/strong\u003e, \u003cstrong\u003eLGS3165\u003c\/strong\u003e, \u003cstrong\u003eMIS16340\u003c\/strong\u003e\n\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 Sierra 1500 (4.8L V8 OHV)\u003c\/li\u003e\n  \u003cli\u003e2002-2011 GMC Sierra 1500 (5.3L V8 OHV)\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 Sierra?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for 2002-2011 GMC Sierra trucks equipped with the 4.8L and 5.3L OHV V8 engines; verify your engine code and displacement prior to installation as this kit does not fit 6.0L or 6.2L configurations.\u003c\/p\u003e\n\n\u003ch4\u003eAre cylinder head bolts or internal piston rings included with this set?\u003c\/h4\u003e\n\u003cp\u003eNo, piston rings and cylinder head bolts are not included and must be sourced separately to complete your long-block rebuild.\u003c\/p\u003e\n\n\u003ch3\u003eThe GMC Heavy-Duty Caliber\u003c\/h3\u003e\n\u003cp\u003eBuilt to handle the demanding torque loads and sustained operating temperatures required by commercial fleets and heavy-duty towing, this sealing solution guarantees maximum clamping retention across all critical block mating surfaces.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67551499288824,"sku":"DS-E2GVNCDDN","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-sierra-2002-2011-4-8l-5-3l-1.jpg?v=1790797696","url":"https:\/\/performancechiptuning.com\/es\/products\/performance-head-gasket-kit-for-gmc-sierra-2002-2011-4-8l-5-3l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}