{"product_id":"dorman-621-525-engine-cooling-fan-blade","title":"Dorman 621-525 Engine Cooling Fan Blade","description":"\u003ch2\u003eReliable Engine Cooling Fan Blade for Chevrolet and GMC Trucks\u003c\/h2\u003e\u003cp\u003eThe Dorman 621-525 engine cooling fan blade is designed to maintain optimal engine temperature for heavy-duty Chevrolet and GMC trucks. Engineered as a standard replacement, this cooling fan blade ensures consistent airflow and helps prevent overheating in demanding driving conditions.\u003c\/p\u003e\u003ch2\u003eKey Features of the Dorman 621-525 Cooling Fan Blade\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e9 durable plastic blades for efficient airflow\u003c\/li\u003e\n\u003cli\u003e635 mm blade diameter suitable for heavy-duty cooling needs\u003c\/li\u003e\n\u003cli\u003eYellow finish for corrosion resistance and easy identification\u003c\/li\u003e\n\u003cli\u003eStandard replacement grade for reliable performance\u003c\/li\u003e\n\u003cli\u003eCompatible with Chevrolet Silverado 2500 HD, 3500 HD and GMC Sierra 2500 HD, 3500 HD models\u003c\/li\u003e\n\u003cli\u003eMounting hardware not included, designed for direct replacement\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description of the Engine Cooling Fan Blade\u003c\/h2\u003e\u003cp\u003eThis Dorman engine cooling fan blade features nine plastic blades with a 635 mm diameter, optimized to provide consistent airflow across the radiator. The yellow finish offers added protection against corrosion, extending the service life of the component. Designed as a standard replacement part, the 621-525 model meets OEM specifications for fit and function. It is specifically engineered for use in Chevrolet Silverado 2500 HD and 3500 HD, as well as GMC Sierra 2500 HD and 3500 HD trucks, ensuring compatibility and reliable cooling performance under heavy-duty conditions.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Issues Addressed\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePrevents engine overheating by maintaining proper airflow\u003c\/li\u003e\n\u003cli\u003eReplaces damaged or worn fan blades that cause vibration or noise\u003c\/li\u003e\n\u003cli\u003eRestores cooling efficiency lost due to cracked or broken blades\u003c\/li\u003e\n\u003cli\u003eHelps maintain engine performance during heavy towing or hauling\u003c\/li\u003e\n\u003cli\u003eAddresses cooling system failures related to fan blade imbalance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eVerify compatibility with Chevrolet Silverado 2500 HD, 3500 HD and GMC Sierra 2500 HD, 3500 HD before installation\u003c\/li\u003e\n\u003cli\u003eMounting hardware is not included; reuse existing hardware or source appropriate fasteners\u003c\/li\u003e\n\u003cli\u003eInspect the fan clutch and motor during installation for optimal cooling system performance\u003c\/li\u003e\n\u003cli\u003eEnsure blades are properly aligned to avoid vibration and premature wear\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty Information\u003c\/h2\u003e\u003cp\u003eDorman engine cooling fan blades are manufactured to meet industry standards for durability and performance. The 621-525 part is a standard replacement grade component designed to provide reliable service life. While specific warranty details may vary, Dorman typically offers limited warranties covering defects in materials and workmanship to ensure customer confidence in their replacement parts.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":44029582180533,"sku":"BKKY-621-525","price":144.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/RB_621525_Ang.jpg?v=1775009617","url":"https:\/\/www.partcatalog.com\/products\/dorman-621-525-engine-cooling-fan-blade","provider":"PartCatalog","version":"1.0","type":"link"}