{"product_id":"muzzys-heater-core-coolant-hose-connectors-set-of-2-3-4-inlet-5-8-hose-upgraded-nylon-with-clamps","title":"Muzzys Heater Core Coolant Hose Connectors - Set of 2, 3\/4\" Inlet 5\/8\" Hose, Upgraded Nylon with Clamps","description":"\u003cp\u003e\u003cstrong\u003eMuzzys upgraded nylon heater core connectors — a set of two with clamps designed to replace cracked or leaky OEM fittings on many 1998–2014 Chevrolet, GMC and Cadillac models.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf your vehicle is showing coolant leaks at the firewall or you’re replacing a failing heater core, these Muzzys 800-409 connectors provide a direct-fit, reinforced replacement built to resist cracking and heat-related deterioration better than many stock parts. Supplied as a matched pair with two stainless-style clamps, the kit is sized for 3\/4\" inlets\/outlets and 5\/8\" heater hoses and replaces a range of GM part numbers for a straightforward swap.\u003c\/p\u003e\n\n\u003ch3\u003eHow do these connectors improve on the original equipment?\u003c\/h3\u003e\n\u003cp\u003eMuzzys engineered these fittings in upgraded nylon that offers higher tensile strength and improved resistance to heat and coolant exposure versus many OEM plastics. That makes them less likely to fracture during removal, installation, or under thermal cycling in older vehicles. They are molded to OEM dimensions so they fit the same firewall tubes and hose sizes for a true direct swap.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUpgraded nylon composition for better durability and crack resistance.\u003c\/li\u003e\n  \u003cli\u003eFormed to match OEM 3\/4\" inlet\/outlet and 5\/8\" hose dimensions.\u003c\/li\u003e\n  \u003cli\u003eIncludes clamps sized for secure hose retention.\u003c\/li\u003e\n  \u003cli\u003eReplaces multiple GM part numbers for broad compatibility.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich vehicles and part numbers does this set fit?\u003c\/h3\u003e\n\u003cp\u003eThis set is made to fit many GM trucks and SUVs produced between 1998 and 2014, including Silverado, Sierra, Tahoe, Suburban, Yukon, Avalanche, Express and Savana lines, plus Cadillac Escalade models. It replaces several commonly referenced OEM numbers so you can cross-check fitment quickly. If your original part number matches one listed, these should be a direct replacement.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits 1998–2014 Chevrolet Silverado, Tahoe, Suburban, Avalanche, Express\/Savana, and more.\u003c\/li\u003e\n  \u003cli\u003eFits 1998–2014 GMC Sierra, Yukon, and larger truck variants.\u003c\/li\u003e\n  \u003cli\u003eCompatible with Cadillac Escalade models in the same years.\u003c\/li\u003e\n  \u003cli\u003eReplaces part numbers: 15032062, 15151873, 15151875, 15792820, 15792821, 15792822, 15834772, 15834773, 800409.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat is involved in installation and what tools help?\u003c\/h3\u003e\n\u003cp\u003eInstallation is straightforward for anyone comfortable with basic cooling-system work. Removing the old connector is easiest with a heater hose disconnect tool, and the new fitting is designed to be a tight, secure fit on the heater core tube. Use soapy water to ease the new connector onto the tube, push until you hear or feel a secure \"click,\" then fasten the supplied clamp to hold the hose.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUse a heater hose disconnect tool to remove the old fitting cleanly.\u003c\/li\u003e\n  \u003cli\u003eClean corrosion and deposits from heater core tubes before installing.\u003c\/li\u003e\n  \u003cli\u003eApply soapy water to help slide the new connector into place; listen for a \"click.\"\u003c\/li\u003e\n  \u003cli\u003eSecure hose with the included clamp; recheck for leaks after refill and bleed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This Muzzys connector kit is intended for DIY mechanics, independent shops and fleet maintenance teams working on late‑90s to mid‑2010s GM trucks and SUVs who need a durable, OEM-form replacement for brittle or leaking heater-core fittings. It’s particularly useful for vehicles undergoing heater core service, firewall hose replacement, or coolant leak repair where an upgraded material and included clamps reduce rework and recurrence of leaks.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are these connectors a direct OEM replacement?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. They are molded to match OEM dimensions and replace the listed GM part numbers for a direct fit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do clamps come with the kit and what hose size is supported?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, two clamps are included. The fittings are for 3\/4\" inlet\/outlet with 5\/8\" heater hoses.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Muzzys","offers":[{"title":"Default Title","offer_id":48086878093470,"sku":"B0CP6DBJVZ","price":33.28,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/muzzys-front-packaging-view.jpg?v=1785908758","url":"https:\/\/northtrailauto.ca\/products\/muzzys-heater-core-coolant-hose-connectors-set-of-2-3-4-inlet-5-8-hose-upgraded-nylon-with-clamps","provider":"North Trail Auto","version":"1.0","type":"link"}