{"product_id":"performance-radiator-with-shroud-for-gmc-s-10-1988-1990-4-3l","title":"Performance Radiator with Shroud for GMC S-10 (1988-1990) 4.3L","description":"\u003ch2\u003eHigh-Efficiency Aluminum Radiator and Shroud Assembly for 1988-1990 GMC S-10\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The performance all-aluminum radiator and shroud assembly replaces the failure-prone factory heat exchanger on the 1988-1990 GMC S-10 to drastically reduce operating temperatures and eliminate coolant leaks under heavy engine load.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock GMC S-10 Thermal Transfer Bottleneck\u003c\/h3\u003e\n\u003cp\u003eFactory cooling systems on the first-generation \u003cstrong\u003eGMT325\u003c\/strong\u003e platform rely on OEM units crimped with fragile plastic or thin-gauge end tanks and rubber sealing gaskets. After decades of thermal cycling, these crimped joints deteriorate, causing micro-fractures, coolant weepage, and sudden pressure loss above standard 15-PSI thresholds. Furthermore, the stock engine-driven mechanical clutch fan robs horsepower from the \u003cstrong\u003eLB4\u003c\/strong\u003e 4.3L powerplant while failing to pull sufficient cubic feet per minute (CFM) across the core during low-speed idle, leading to rapid heat soak.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis direct-fit drop-in cooling upgrade incorporates a high-density, furnace-brazed aluminum tube-and-fin core welded directly to reinforced aluminum end tanks via precision TIG welding. By eliminating mechanically crimped plastic tanks, it withstands aggressive pressure and thermal shock. The included form-fitted aluminum fan shroud directs maximum negative pressure across the core, paired with a high-output electric fan that eliminates parasitic accessory drag from the crankshaft while delivering consistent, high-velocity airflow even at zero vehicle velocity.\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;\"\u003e1988-1990 GMC S-10\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;\"\u003eLB4 4.3L V6 \/ GMT325\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;\"\u003e160 hp \/ 230 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;\"\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\u003e1988 GMC S-10 4.3L V6\u003c\/li\u003e\n  \u003cli\u003e1989 GMC S-10 4.3L V6\u003c\/li\u003e\n  \u003cli\u003e1990 GMC S-10 4.3L V6\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the GMT325 S-10?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 1988-1990 GMC S-10 equipped with the LB4 4.3L V6 engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this assembly replace the factory mechanical fan clutch?\u003c\/strong\u003e\u003cbr\u003e Yes, the integrated electric fan and shroud replace the factory belt-driven mechanical fan to reduce accessory drag and improve idle airflow.\u003c\/p\u003e\n\n\u003ch3\u003eThe GMC Workhorse Caliber\u003c\/h3\u003e\n\u003cp\u003eEngineered to handle severe-duty towing and high-ambient working environments, this all-aluminum cooling pack provides structural durability and uninterrupted heat dissipation without fatigue or plastic tank failure.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50593926611192,"sku":"DS-ER43Q67IY","price":362.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/performance-radiator-with-shroud-for-gmc-s-10-1988-1990-4-3l-1.jpg?v=1790053021","url":"https:\/\/performancechiptuning.com\/products\/performance-radiator-with-shroud-for-gmc-s-10-1988-1990-4-3l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}