{"product_id":"performance-radiator-for-gmc-envoy-2005-2009-5-3l","title":"Performance Radiator for GMC Envoy (2005-2009) 5.3L","description":"\u003ch2\u003eAll-Aluminum Heavy-Duty Radiator for 2005-2009 GMC Envoy\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eDirect Cooling Upgrade:\u003c\/strong\u003e Replaces fragile factory plastic-tank units with an all-aluminum downflow heat exchanger engineered to stabilize coolant temperatures under heavy towing and high thermal loads.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Envoy End-Tank Failure Point\u003c\/h3\u003e\n\u003cp\u003eFactory radiators in the GMT360 platform rely on crimped plastic end tanks bonded to an aluminum core. Over repeated thermal cycles and system pressure spikes, the composite tanks degrade, turn brittle, and split along the crimp seams. Additionally, high thermal dissipation demands during heavy towing rapidly expose the flow limitations of the stock core, leading to sustained heat soak and elevated transmission fluid temperatures.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered entirely from aircraft-grade AA5052 aluminum, this direct bolt-on radiator eliminates leak-prone composite plastics with 100% TIG-welded structural joints. The downflow core measures 18.11 in x 26.69 in x 1.02 in, utilizing an efficient multi-louvered fin array that accelerates heat rejection and prevents thermal runaway. It features an integrated transmission fluid cooler, a CNC-machined filler neck, and an included radiator cap, pressure-tested for zero-leak reliability.\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;\"\u003e2005-2009 GMC Envoy 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;\"\u003eVortec 5300 (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;\"\u003e300 hp \/ 321 lb-ft (Approx)\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 (Interchange: 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\u003e2005-2009 GMC Envoy (5.3L V8 LH6)\u003c\/li\u003e\n  \u003cli\u003eNote: Fits 5.3L V8 models only; does not fit 4.2L Inline-6 variants due to core dimension differences.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe GMC Towing Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt to handle severe duty cycles, this all-aluminum cooling system protects your LH6 V8 and automatic transmission against thermal breakdown when hauling heavy payloads or traversing steep mountain grades.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50459255570680,"sku":"DS-EBRKYXT3X","price":195.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/performance-radiator-for-gmc-envoy-2005-2009-5-3l-1.jpg?v=1788809225","url":"https:\/\/performancechiptuning.com\/fr\/products\/performance-radiator-for-gmc-envoy-2005-2009-5-3l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}