{"product_id":"performance-radiator-for-gmc-envoy-2002-2009-4-2l","title":"Performance Radiator for GMC Envoy (2002-2009) 4.2L","description":"\u003ch2\u003eHeavy-Duty All-Aluminum 3-Row Performance Radiator for 2002-2009 GMC Envoy\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eDirect Cooling Upgrade:\u003c\/strong\u003e Drops engine operating temperatures and eliminates failure-prone plastic end tanks on the 4.2L inline-six GMT360 platform under heavy load and towing conditions.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Envoy Cooling Bottleneck\u003c\/h3\u003e\n\u003cp\u003eFactory GMT360 radiators rely on crimped plastic end tanks paired with thin, single-row cores that deteriorate over repeated heat cycles. Under sustained engine loads, high ambient temperatures, or towing, the high-compression Atlas LL8 inline-six quickly reaches thermal saturation. Over time, OEM crimp seams develop micro-fractures, and plastic tanks become brittle and crack, leading to rapid coolant loss and potential automatic transmission cross-contamination from failed internal cooler lines.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eConstructed from 100% TIG-welded aircraft-grade aluminum, this performance unit maximizes heat rejection with a dense, 3-row furnace-brazed core measuring 18.1 in H x 26.75 in W. Solid aluminum end tanks replace brittle composite materials, eliminating failure-prone mechanical crimps and gaskets. An integrated M14x1.5 internal transmission oil cooler maintains optimal automatic transmission fluid temperatures during extended hill climbs and severe duty.\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;\"\u003e2002-2009 GMC Envoy (Automatic)\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;\"\u003e4.2L Atlas LL8 (Vortec 4200) \/ 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;\"\u003e275-291 hp \/ 275-277 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;\"\u003eDPI 2458, CU2458, GM3010420, 15196385\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2002-2009 GMC Envoy 4.2L Inline-6 Automatic\u003c\/li\u003e\n  \u003cli\u003eInterchange: DPI 2458, CU2458, Q2458, RAD2458\u003c\/li\u003e\n  \u003cli\u003eOEM Numbers: GM3010420, GM3010449, 15196385\u003c\/li\u003e\n  \u003cli\u003eFitment Note: Designed for 4.2L I6 models only; does not fit 5.3L or 6.0L V8 platforms.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe GMC Durability Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered for sustained thermal control and heavy towing duties, this direct-fit aluminum cooling upgrade ensures your GMT360 powertrain maintains stable operating temperatures in the most demanding environments.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50426259865848,"sku":"DS-EJUTS5T02","price":244.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/performance-radiator-for-gmc-envoy-2002-2009-4-2l-1.jpg?v=1788397573","url":"https:\/\/performancechiptuning.com\/products\/performance-radiator-for-gmc-envoy-2002-2009-4-2l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}