{"product_id":"performance-radiator-for-gmc-sierra-1999-2007","title":"Performance Radiator for GMC Sierra (1999-2007)","description":"\u003ch2\u003eHigh-Capacity Performance Radiator for 1999-2007 GMC Sierra\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eDirect replacement 3-row aluminum radiator designed to maximize thermal transfer and coolant capacity for heavy-duty towing and high-stress driving conditions.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Sierra Thermal Bottleneck\u003c\/h3\u003e\n\u003cp\u003eThe factory GMT800 radiators, often utilizing standard T-3303 grade aluminum or plastic tank construction, suffer from severe limitations under high load. During heavy towing or prolonged incline driving, the stock single or dual-core setups struggle to dissipate heat efficiently, leading to rapid coolant temperature spikes. Furthermore, OEM plastic end tanks are prone to stress fractures from constant thermal cycling. When exposed to high pressure and elevated temperatures, standard T-3303 aluminum cores are highly susceptible to corrosion, internal scaling, and physical deformation, ultimately risking a catastrophic engine overheating event when pushed past their intended factory limits.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis high-performance radiator is constructed entirely from AA5052 aircraft-grade aluminum, an Al-Mg alloy renowned for superior tensile strength and corrosion resistance compared to base-tier alternatives. Featuring a massive 34-inch wide, 3-row tube and fin core design, it drastically increases the active cooling surface area. This architecture expands overall fluid capacity and improves heat dissipation efficiency by 30% to 45% over OEM specifications. TIG-welded 2mm thick aluminum end tanks permanently eliminate the failure points of factory plastic equivalents. Integrated engine oil and transmission coolers ensure critical drivetrain fluids remain within optimal operating temperatures during extreme load scenarios. The assembly is secured with a CNC-machined billet aluminum fill neck and a durable OEM-style brass petcock drain, guaranteeing reliable, leak-free operation over a prolonged lifespan.\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;\"\u003e1999-2007 GMC Sierra\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 V8 \/ GMT800\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;\"\u003e270-345 hp \/ 315-455 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\u003eSierra 1500: 1999–2013 (All Gas Engines)\u003c\/li\u003e\n  \u003cli\u003eSierra 1500 HD: 2001–2007 (6.0L V8)\u003c\/li\u003e\n  \u003cli\u003eSierra 2500 (Non-HD): 1999–2004 (5.3L, 6.0L V8)\u003c\/li\u003e\n  \u003cli\u003eSierra 2500 HD: 2001–2010 (6.0L \u0026amp; 8.1L Gas V8 only)\u003c\/li\u003e\n  \u003cli\u003eSierra 3500 \/ 3500 HD: 2001–2010 (6.0L \u0026amp; 8.1L Gas V8 only)\u003c\/li\u003e\n  \u003cli\u003eNote: Core length is 34\". Overall width is 40\". Includes integral Engine Oil Cooler (Driver Side) and Transmission Oil Cooler (Passenger Side). Will also work for models with Transmission Oil Cooler only.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe GMC Heavy-Duty Standard\u003c\/h3\u003e\n\u003cp\u003eFor heavy-duty truck applications, maintaining strict thermal control is non-negotiable. This radiator ensures your drivetrain components survive the rigors of heavy hauling, steep gradients, and high-payload operation, preventing premature wear and maximizing the reliability of your Sierra platform.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50143748980984,"sku":"DS-EE2A2N9WW","price":339.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/performance-radiator-for-gmc-sierra-1999-2007-1.webp?v=1786477207","url":"https:\/\/performancechiptuning.com\/fr\/products\/performance-radiator-for-gmc-sierra-1999-2007","provider":"Performance Chip Tuning","version":"1.0","type":"link"}