{"product_id":"performance-radiator-for-gmc-jimmy-1973-1991-4-1l-4-8l-5-0l-5-7l-6-2l","title":"Performance Radiator for GMC Jimmy (1973-1991) 4.1L 4.8L 5.0L 5.7L 6.2L","description":"\u003ch2\u003eHigh-Efficiency All-Aluminum Performance Radiator for 1973-1991 GMC Jimmy\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Performance Radiator replaces the inefficient factory cooling unit on the 1973-1991 GMC Jimmy to maximize heat rejection, eliminate coolant leaks, and prevent engine overheating under heavy load.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock GMC Jimmy Thermal Bottleneck\u003c\/h3\u003e\n\u003cp\u003eFactory cooling systems on the \u003cstrong\u003eK5\u003c\/strong\u003e platform relied heavily on restrictive copper-brass cores or aging stamped tanks with mechanically crimped or lead-soldered seams. Over decades of heat cycles and chassis deflection on rugged terrain, these OEM joints degrade, corrode, and crack. Furthermore, low fin density and accumulated internal scale restrict fluid velocity, leading to chronic heat soak when hauling, towing, or operating at low speeds on trails with \u003cstrong\u003eSmall Block Chevy (SBC)\u003c\/strong\u003e or \u003cstrong\u003e6.2L Detroit Diesel\u003c\/strong\u003e powertrains.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis drop-in performance upgrade features an aircraft-grade all-aluminum construction utilizing precision TIG-welded end tanks and a furnace-brazed tube-and-fin core. By eliminating brittle gaskets, crimped plastic, and epoxy seals, it provides superior burst pressure resistance and torsional durability under frame twist. The optimized fin-pitch layout maximizes ambient airflow contact, driving a substantially higher thermal transfer rate than factory units to keep operating temperatures stabilized under extreme thermal demands.\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; margin-bottom: 20px;\"\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e1973-1991 GMC Jimmy\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eGM SBC \/ Inline-6 \/ Detroit Diesel \/ \u003cstrong\u003eK5\u003c\/strong\u003e Platform\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e105–210 hp \/ 185–300 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e\u003cstrong\u003eCC716\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1973-1991 GMC Jimmy (4.1L 250ci L6, 4.8L 292ci L6, 5.0L 305ci V8, 5.7L 350ci V8, 6.2L Detroit Diesel V8)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the K5 Jimmy?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct bolt-in fit for the 1973-1991 GMC Jimmy equipped with the \u003cstrong\u003eK5\u003c\/strong\u003e chassis and compatible GM powertrains.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this radiator support automatic transmissions?\u003c\/strong\u003e\u003cbr\u003e Yes, it includes internal transmission cooler lines configured to thread into standard factory automatic cooler lines without custom fabrication.\u003c\/p\u003e\n\n\u003ch3\u003eThe GMC Heavy-Duty Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt for the punishing demands of full-size 4x4 utility, this all-aluminum cooling assembly delivers structural rigidity and continuous thermal control, ensuring your trail or towing rig runs cool regardless of payload or grade.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50593838334200,"sku":"DS-E8JWLU8DG","price":222.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/performance-radiator-for-gmc-jimmy-1973-1991-4-1l-4-8l-5-0l-5-7l-6-2l-1.jpg?v=1790052233","url":"https:\/\/performancechiptuning.com\/fr\/products\/performance-radiator-for-gmc-jimmy-1973-1991-4-1l-4-8l-5-0l-5-7l-6-2l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}