{"product_id":"performance-radiator-for-buick-rainier-2004-2007-5-3l","title":"Performance Radiator for Buick Rainier (2004-2007) 5.3L","description":"\u003ch2\u003eDirect-Fit All-Aluminum Performance Radiator for 2004-2007 Buick Rainier 5.3L\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e Replaces failure-prone OEM composite radiators with a fully welded AA5052 aluminum cooling assembly to maintain optimal engine and transmission operating temperatures under load.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Rainier Thermal Breakdown\u003c\/h3\u003e\n\u003cp\u003eThe factory cooling system on the GMT360 platform relies on plastic end tanks crimped onto an aluminum core. Over repeated thermal cycles, the factory plastic degrades, embrittles, and develops stress fractures along the tank seams and inlet neck. Under heavy towing or extended uphill grades, these composite tanks cannot withstand sustained hydraulic pressure fluctuations, risking catastrophic coolant loss and severe cylinder head warping on the 5.3L V8.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered for maximum thermal dissipation, this performance downflow radiator features 100% TIG-welded AA5052 aircraft-grade aluminum end tanks mated to a high-efficiency aluminum racing core measuring 18.11 in x 26.69 in x 1.02 in. The brazed tube-and-fin design maximizes thermal transfer surface area while eliminating vulnerable plastic seams and rubber gaskets. An integrated internal transmission oil cooler protects the 4L60E\/4L70E gearbox from thermal breakdown, ensuring consistent line pressures and longevity.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px;\"\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e2004-2007 Buick Rainier 5.3L V8\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eEngine \/ Chassis\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eGen III\/IV (LM4\/LH6) \/ GMT360\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eStock Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e290-300 hp \/ 325-330 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eCore Dimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e18.11 in H x 26.69 in W x 1.02 in T\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eInlet \/ Outlet\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e1.26 in \/ 1.57 in\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eAN67338 (DPI: 2563, CU2563, CC2563, DP2563)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2004 Buick Rainier CXL \/ CXL Plus 5.3L V8 (LM4)\u003c\/li\u003e\n  \u003cli\u003e2005 Buick Rainier CXL 5.3L V8 (LH6)\u003c\/li\u003e\n  \u003cli\u003e2006 Buick Rainier CXL 5.3L V8 (LH6)\u003c\/li\u003e\n  \u003cli\u003e2007 Buick Rainier CXL 5.3L V8 (LH6)\u003c\/li\u003e\n  \u003cli\u003e\u003cem\u003eNote: Fits 5.3L V8 models only; does not fit 4.2L Inline-6 variants.\u003c\/em\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe Buick Heavy-Duty Caliber\u003c\/h3\u003e\n\u003cp\u003eBuilt to handle heavy towing and extreme heat loads, this all-aluminum unit provides the rugged dependability required for high-stress SUV and truck applications.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50459262550264,"sku":"DS-E5KSPJSC5","price":195.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/performance-radiator-for-buick-rainier-2004-2007-5-3l-1.jpg?v=1788809255","url":"https:\/\/performancechiptuning.com\/fr\/products\/performance-radiator-for-buick-rainier-2004-2007-5-3l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}