{"product_id":"four-seasons-90778-hvac-heater-core","title":"Four Seasons 90778 HVAC Heater Core","description":"\u003ch2\u003eReliable Heater Core Replacement for Buick, Cadillac, and Chevrolet\u003c\/h2\u003e\u003cp\u003eThe Four Seasons Heater Core 90778 is designed to restore efficient heating performance in select Buick, Cadillac, and Chevrolet vehicles. Engineered with durable aluminum construction, this heater core ensures consistent heat transfer and long-lasting operation for models like the Caprice, Century, Fleetwood, and Impala.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCore dimensions: 8-1\/4\" length, 6-1\/2\" width, 1-3\/8\" thickness\u003c\/li\u003e\n\u003cli\u003eConstructed from corrosion-resistant aluminum material\u003c\/li\u003e\n\u003cli\u003eCompatible with Buick Caprice, Cadillac Fleetwood, Chevrolet Impala, Roadmaster, and more\u003c\/li\u003e\n\u003cli\u003eMeets or exceeds OEM specifications for reliable fit and function\u003c\/li\u003e\n\u003cli\u003eIncludes dual tubes sized 0.625\" and 0.750\" for efficient coolant flow\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFour Seasons Heater Core Product Line Overview\u003c\/h2\u003e\u003cp\u003eThe Four Seasons Heater Core line focuses on delivering quality HVAC components that meet or exceed original equipment standards. The 90778 heater core is part of this line, offering precise fitment and durable aluminum construction to maintain optimal heating system performance in various GM vehicles. This product line emphasizes reliable heat exchange and corrosion resistance to support vehicle comfort and HVAC system longevity.\u003c\/p\u003e\u003ch2\u003eDetailed Product Description and Specifications\u003c\/h2\u003e\u003cp\u003eThis HVAC heater core features an aluminum core measuring 8.25 inches in height, 6.5 inches in width, and 1.375 inches in depth. The aluminum material provides effective heat transfer while resisting corrosion, which is critical for maintaining heater core integrity over time. The heater core includes two tubes with diameters of 0.625 inches (15.875 mm) and 0.75 inches (19.05 mm), designed for proper coolant circulation. The pipe positioning is fixed, ensuring compatibility with the specified vehicle models without the need for adjustment.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Problem Resolution\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRestores heating function in Buick Caprice and Century models\u003c\/li\u003e\n\u003cli\u003eReplaces leaking or clogged heater cores in Cadillac Fleetwood and Roadmaster\u003c\/li\u003e\n\u003cli\u003eSolves insufficient cabin heat issues in Chevrolet Impala and Commercial Chassis vehicles\u003c\/li\u003e\n\u003cli\u003eAddresses coolant leaks inside the passenger compartment\u003c\/li\u003e\n\u003cli\u003eEliminates heater core corrosion and blockage problems\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eWhen installing the Four Seasons Heater Core 90778, ensure the cooling system is properly drained before removal. Verify the heater core dimensions and tube sizes match the vehicle’s specifications. Since the pipe positioning is not adjustable, confirm alignment with existing HVAC connections. It is recommended to flush the cooling system to remove debris before installing the new heater core to prevent premature clogging.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty Information\u003c\/h2\u003e\u003cp\u003eThe Four Seasons Heater Core 90778 meets or exceeds OEM standards, providing reliable performance and durability. Manufactured with corrosion-resistant aluminum, this heater core is built to withstand typical HVAC system conditions. While specific warranty details are not provided here, Four Seasons products generally come with a limited warranty covering defects in materials and workmanship.\u003c\/p\u003e","brand":"Four Seasons","offers":[{"title":"Default Title","offer_id":52118513615029,"sku":"BBRN-90778","price":53.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/FS_90778_Ang.jpg?v=1775161881","url":"https:\/\/www.partcatalog.com\/products\/four-seasons-90778-hvac-heater-core","provider":"PartCatalog","version":"1.0","type":"link"}