{"product_id":"performance-water-pump-kit-for-gmc-envoy-2007-2009-5-3l","title":"Performance Water Pump Kit for GMC Envoy (2007-2009) 5.3L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Flow Water Pump Kit for 2007-2009 GMC Envoy (GMT360)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Performance Water Pump Kit replaces the failure-prone factory coolant pump and thermostat on the 2007-2009 Envoy to restore optimal coolant circulation and eliminate thermal runaway under load.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock GMC Envoy Cooling System Limitations\u003c\/h3\u003e\n\u003cp\u003eThe factory water pump installed on the \u003cstrong\u003eGMT360\u003c\/strong\u003e platform paired with the 5.3L \u003cstrong\u003eLH6\u003c\/strong\u003e Gen IV small-block V8 is notorious for premature shaft bearing wear and internal mechanical seal degradation. Heat cycling accelerates elastomer fatigue in the integrated thermostat housing gasket, while cavitation at higher engine RPM compromises impeller efficiency. Over time, coolant weeps past the internal relief port, leading to bearing contamination, severe belt misrouting load, fluid loss, and dangerous head gasket-threatening overheating events during heavy hauling or ambient summer heat soak.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis replacement pump assembly features a precision-machined, heavy-duty cast aluminum housing engineered with reinforced bearing races and a high-efficiency cast impeller designed to maximize fluid velocity across the engine block. Outfitted with high-grade carbon-ceramic unitized shaft seals, it prevents fluid intrusion and eliminates pump bearing play. The kit includes an OEM-spec thermostat pre-assembled into an anti-corrosion housing, along with exact-fit rectangular and oval die-cut perimeter gaskets to eliminate interface weeping and maintain consistent line pressure across the cooling jackets.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 Engine Water Pump\u003c\/li\u003e\n  \u003cli\u003e1 Thermostat Housing\u003c\/li\u003e\n  \u003cli\u003e1 Thermostat\u003c\/li\u003e\n  \u003cli\u003e2 Rectangular Gaskets\u003c\/li\u003e\n  \u003cli\u003e1 Oval Gasket\u003c\/li\u003e\n  \u003cli\u003e2 Mounting Bolts\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;\"\u003e2007-2009 GMC Envoy\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;\"\u003e5.3L LH6 V8 \/ GMT360\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;\"\u003e300 hp \/ 321 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;\"\u003e12681417, 12600767, AW6009\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\u003e2007-2009 GMC Envoy 5.3L V8 (Denali, 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 GMT360 Envoy?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2007-2009 GMC Envoy equipped with the \u003cstrong\u003eLH6\u003c\/strong\u003e 5.3L V8 engine; it does not fit models equipped with the 4.2L LL8 inline-six.\u003c\/p\u003e\n\n\u003ch4\u003eDo I need to bleed the cooling system after installing this pump?\u003c\/h4\u003e\n\u003cp\u003eYes, thorough cooling system burping is mandatory to clear air pockets from the reverse-flow cylinder heads before operating the vehicle.\u003c\/p\u003e\n\n\u003ch3\u003eThe GMC Heavy-Duty Caliber\u003c\/h3\u003e\n\u003cp\u003eEngineered to handle severe thermal loads, this pump assembly ensures continuous cooling performance whether towing trailers on steep highway grades or tackling daily stop-and-go commuting.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67545117163768,"sku":"DS-E2NENJWV0","price":108.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/performance-water-pump-kit-for-gmc-envoy-2007-2009-5-3l-1.jpg?v=1790717154","url":"https:\/\/performancechiptuning.com\/products\/performance-water-pump-kit-for-gmc-envoy-2007-2009-5-3l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}