{"product_id":"aluminum-radiator-for-gmc-topkick-1991-2002-6-6l-7-0l","title":"Aluminum Radiator for GMC Topkick (1991-2002) 6.6L 7.0L","description":"\u003ch2\u003eHigh-Capacity 4-Row Aluminum Radiator for 1991-2002 GMC Topkick\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eEliminates severe thermal throttling and fleet downtime\u003c\/strong\u003e by replacing leak-prone OEM cooling units with an all-aluminum, 4-row brazed heat exchanger engineered for continuous heavy-duty service cycles.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Topkick Cooling Vulnerability\u003c\/h3\u003e\n\u003cp\u003eFactory GMT530 radiators rely on crimped brass-copper joints or plastic end tanks that consistently degrade under the mechanical strain of commercial operation. Continuous torsional chassis flex transmits vibration directly into the core, causing end-tank gasket failures and fractured tube seams. Under sustained peak GVWR hauling, OEM narrow-pass cores quickly succumb to heat soak, causing coolant temperatures to spike, triggering engine de-rates, and risking catastrophic cylinder head distortion.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis direct-fit radiator is manufactured entirely from aircraft-grade aluminum, utilizing TIG-welded tanks and a furnace-brazed 4-row tube-and-fin core to eliminate epoxy joints and rubber O-rings. The high-density louvered fin design exponentially increases total surface area for superior ambient heat dissipation, while wide-channel tubes reduce fluid flow resistance to maintain high coolant velocity. Engineered to withstand high-pressure spikes and severe vibration, it provides unrelenting heat rejection for demanding vocational fleets.\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;\"\u003e1991-2002 GMC Topkick\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;\"\u003eCat 3116 \/ GM 427 \/ GMT530\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;\"\u003e170-235 hp \/ 385-605 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;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1991-2002 GMC Topkick (C5000, C6000, C7000, C5500, C6500, C7500) 6.6L Turbo Diesel\u003c\/li\u003e\n  \u003cli\u003e1991-2002 GMC Topkick (C5000, C6000, C7000, C5500, C6500, C7500) 7.0L V8 Gas\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe GMC Heavy-Duty Standard\u003c\/h3\u003e\n\u003cp\u003eCommercial haulers demand uninterrupted thermal stability under heavy towing and maximum payloads. Constructed to withstand grueling fleet hours, this cooling assembly ensures optimal fluid heat transfer and dependable mechanical reliability in the most punishing work conditions.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50496636256504,"sku":"DS-EDRZSMJKQ","price":443.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/aluminum-radiator-for-gmc-topkick-1991-2002-6-6l-7-0l-1.jpg?v=1789246674","url":"https:\/\/performancechiptuning.com\/fr\/products\/aluminum-radiator-for-gmc-topkick-1991-2002-6-6l-7-0l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}