{"product_id":"dorman-626-639-hvac-heater-hose-assembly","title":"Dorman 626-639 HVAC Heater Hose Assembly - Outlet","description":"\u003ch2\u003eDurable HVAC Heater Hose Assembly for Select GM Vehicles\u003c\/h2\u003e\u003cp\u003eThe Dorman 626-639 HVAC heater hose assembly is engineered to provide reliable heating system performance for your Buick, Chevrolet, GMC, or Oldsmobile vehicle. Designed specifically for models like the Envoy, Trailblazer, and Bravada, this molded hose assembly ensures proper coolant flow and system integrity.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eConstructed with high-quality rubber hose and steel components for durability\u003c\/li\u003e\n\u003cli\u003eNatural color with a protective sleeve for added abrasion resistance\u003c\/li\u003e\n\u003cli\u003eConsistent 0.564 inch inside diameter on both ends for uniform coolant flow\u003c\/li\u003e\n\u003cli\u003e29-inch centerline length molded assembly for precise fitment\u003c\/li\u003e\n\u003cli\u003eEnd 1 features clamp attachment; End 2 uses quick connect for secure installation\u003c\/li\u003e\n\u003cli\u003eRated for a maximum working pressure of 100 psi\u003c\/li\u003e\n\u003cli\u003eIncludes one branch and no clamps or heat shields\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThe Dorman 626-639 heater hose assembly is a molded HVAC hose designed to maintain efficient coolant circulation within the heating system of compatible GM SUVs and trucks. Its rubber construction combined with steel reinforcements provides flexibility and strength, while the attached protective sleeve guards against wear and heat damage. Both hose ends have an outside diameter of 0.894 inches and an inside diameter of 0.564 inches, ensuring a consistent seal and flow rate. The assembly’s 29-inch centerline length matches OEM specifications for a direct replacement without modification. The hose features a clamp attachment on one end and a quick connect fitting on the other, facilitating straightforward installation and secure connections.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicles and Applications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBuick Bravada\u003c\/li\u003e\n\u003cli\u003eChevrolet Trailblazer, Trailblazer EXT\u003c\/li\u003e\n\u003cli\u003eGMC Envoy, Envoy XL, Envoy XUV, Rainier\u003c\/li\u003e\n\u003cli\u003eOldsmobile Bravada\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThis heater hose assembly is intended for use in HVAC systems to transport heated coolant from the engine to the heater core, enabling cabin heating functionality.\u003c\/p\u003e\u003ch2\u003eCommon Issues Addressed by This Heater Hose Assembly\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eLeaking or cracked heater hoses causing coolant loss\u003c\/li\u003e\n\u003cli\u003eReduced heating efficiency due to damaged or collapsed hoses\u003c\/li\u003e\n\u003cli\u003eCoolant contamination from deteriorated hose materials\u003c\/li\u003e\n\u003cli\u003eImproper fitment leading to coolant leaks or disconnections\u003c\/li\u003e\n\u003cli\u003eWear from abrasion or heat exposure compromising hose integrity\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eBefore installation, ensure the engine is cool and the cooling system is depressurized. Remove the old heater hose assembly carefully to avoid damaging surrounding components. The Dorman 626-639 features a molded design with a protective sleeve, so verify hose routing matches OEM configuration. Use appropriate clamps on the clamp end and ensure the quick connect fitting fully seats for a secure connection. Inspect all connections for leaks after installation and refill the cooling system as needed.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 626-639 heater hose assembly undergoes rigorous quality control to ensure durability and performance in demanding automotive environments. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in material and workmanship.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":44040727265461,"sku":"BKKY-626-639","price":62.33,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/RB_626639_Ang.jpg?v=1775009854","url":"https:\/\/www.partcatalog.com\/products\/dorman-626-639-hvac-heater-hose-assembly","provider":"PartCatalog","version":"1.0","type":"link"}