{"product_id":"performance-oil-pump-timing-chain-water-pump-kit-for-gmc-yukon-2000-2003-5-3l","title":"Performance Oil Pump Timing Chain \u0026 Water Pump Kit for GMC Yukon (2000-2003) 5.3L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Reliability Oil Pump, Timing Chain \u0026amp; Water Pump Service Kit for 2000-2003 GMC Yukon (GMT800)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Performance Oil Pump, Timing Chain \u0026amp; Water Pump Kit replaces critical high-mileage wear components on the 2000-2003 GMC Yukon to restore engine lubrication pressure, stabilize camshaft timing, and prevent cooling system failure.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock GMC Yukon Timing and Cooling Vulnerabilities\u003c\/h3\u003e\n\u003cp\u003eFactory \u003cstrong\u003eGMT800\u003c\/strong\u003e platforms powered by the \u003cstrong\u003eVortec 5300 LM7\u003c\/strong\u003e are prone to progressive oil pressure loss due to internal bypass valve sticking and housing scoring within the OEM oil pump. Additionally, high operating hours stretch the factory single-row timing chain, inducing slack that degrades camshaft degree accuracy and spark timing consistency. Paired with aged water pump shaft seals and internal impeller cavitation, the factory front-drive assembly risks catastrophic bearing starvation and thermal overload under heavy load or high-ambient towing conditions.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive overhaul kit features a high-flow precision-machined aluminum oil pump engineered to maintain hydrodynamic oil wedge integrity across all main and rod journals. The upgraded timing assembly incorporates high-tensile link plating and induction-hardened steel sprockets to eliminate chain deflection and timing retard. Completed by an OE-spec cast aluminum water pump with heavy-duty internal mechanical seals, this kit includes direct-fit timing cover gaskets and application-specific O-rings to ensure a leak-free hydraulic and thermal seal under continuous operating temperatures.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 Oil Pump\u003c\/li\u003e\n  \u003cli\u003e1 Timing Chain Kit (chain and sprockets)\u003c\/li\u003e\n  \u003cli\u003e1 Timing Cover Gasket Set\u003c\/li\u003e\n  \u003cli\u003e1 Water Pump\u003c\/li\u003e\n  \u003cli\u003eAssorted seals and O-rings\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;\"\u003e2000-2003 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;\"\u003eVortec 5300 LM7 \/ GMT800\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;\"\u003e285 hp \/ 325 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;\"\u003eN\/A\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\u003e2000-2003 GMC Yukon 5.3L V8\u003c\/li\u003e\n  \u003cli\u003eFits GM Vortec 4.8L, 5.3L, and 6.0L OHV V8 block configurations\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 Yukon?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2000-2003 GMC Yukon equipped with the \u003cstrong\u003eVortec 5300 LM7\u003c\/strong\u003e engine. Confirm vehicle displacement and pushrod V8 configuration prior to ordering.\u003c\/p\u003e\n\n\u003ch4\u003eShould the new oil pump be primed prior to installation?\u003c\/h4\u003e\n\u003cp\u003eYes, packing the gear pocket with clean engine assembly lubricant or fresh oil is essential to ensure immediate oil pickup and prevent dry startup wear on the pump gears and engine bearings.\u003c\/p\u003e\n\n\u003ch3\u003eThe GMC Yukon Heavy-Duty Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt for the rigorous demands of the GMT800 full-size chassis, this engine service kit delivers the oil volume, valve timing precision, and coolant flow capacity required to support heavy towing, prolonged idling, and severe fleet duty cycles.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67545426723064,"sku":"DS-EJVXDQ67P","price":194.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/performance-oil-pump-timing-chain-water-pump-kit-for-gmc-yukon-2000-2003-5-3l-1.jpg?v=1790723772","url":"https:\/\/performancechiptuning.com\/products\/performance-oil-pump-timing-chain-water-pump-kit-for-gmc-yukon-2000-2003-5-3l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}