{"product_id":"mitzone-coolant-thermostat-housing-assembly-for-3-6l-buick-cadillac-chevy-gmc-2017-2023-complete-kit-with-thermostat-gasket","title":"MITZONE Coolant Thermostat Housing Assembly for 3.6L Buick Cadillac Chevy GMC (2017-2023) — Complete Kit with Thermostat \u0026 Gasket","description":"\u003cp\u003e\u003cstrong\u003eMITZONE Coolant Thermostat Housing Assembly is a complete replacement unit (housing, thermostat, gasket) engineered to fit 3.6L Buick, Cadillac, Chevy and GMC models from 2017–2023 for reliable cooling system performance.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf your vehicle’s thermostat housing is cracked, leaking, or the thermostat is sticking, swapping in a full assembly restores coolant routing and temperature control without hunting down separate parts. This MITZONE kit replaces OE numbers 12673659 and 12678779, and is built to meet OEM-style tolerances for a direct-fit installation on compatible 3.6L engines. The assembly is intended as a like-for-like service part for Club models including LaCrosse, Regal Sportback, XT5, XT6, Blazer and Acadia across the listed years.\u003c\/p\u003e\n\n\u003ch3\u003eWill this assembly fit my Buick, Cadillac, Chevy or GMC with a 3.6L engine?\u003c\/h3\u003e\n\u003cp\u003eCheck vehicle year, model and engine displacement before ordering. MITZONE designed this assembly specifically for the listed model-year runs and 3.6L V6 engines; it replaces the factory housings with the same mounting points and coolant passages.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible models: 2017–2019 LaCrosse; 2018–2020 Regal Sportback\u003c\/li\u003e\n  \u003cli\u003eCross-compatibility: 2017–2023 XT5, 2020–2023 XT6, 2019–2023 Blazer, 2017–2023 Acadia\u003c\/li\u003e\n  \u003cli\u003eOE replacement numbers: 12673659, 12678779 for reference\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow difficult is installation and what comes in the box?\u003c\/h3\u003e\n\u003cp\u003eInstallation is designed to be straightforward for technicians or experienced DIYers: the unit mounts where the original housing sat and uses the same bolt pattern. MITZONE ships a pre-assembled kit that reduces parts hunting and helps minimize downtime.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIncluded parts: thermostat housing, thermostat, and gasket — ready to install\u003c\/li\u003e\n  \u003cli\u003eInstallation notes: follow OEM torque specs, replace coolant and bleed system per factory procedure\u003c\/li\u003e\n  \u003cli\u003eNo extra sensors are included unless originally fitted on the vehicle—verify sensor locations before removal\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and quality controls were used to make this thermostat housing?\u003c\/h3\u003e\n\u003cp\u003eMITZONE manufactures this assembly to meet OEM-style performance and dimensional standards, using durable materials that resist heat and coolant exposure. The thermostat element and sealing gasket are matched to the housing to reduce leak risk and ensure consistent operation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMaterials chosen for thermal stability and corrosion resistance\u003c\/li\u003e\n  \u003cli\u003ePrecision-molded housing to maintain factory fit and coolant flow paths\u003c\/li\u003e\n  \u003cli\u003eComplete kit minimizes fitment and compatibility issues\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow long can I expect the replacement to last and when should I replace it again?\u003c\/h3\u003e\n\u003cp\u003eLongevity depends on driving conditions and coolant maintenance; a properly installed MITZONE assembly should perform comparably to an OEM unit. Regular coolant changes and system inspections will help the thermostat and housing last for many years and miles.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eInspect for leaks after initial installation and during routine service intervals\u003c\/li\u003e\n  \u003cli\u003eReplace coolant per manufacturer schedule to reduce corrosion and deposits\u003c\/li\u003e\n  \u003cli\u003eIf you encounter persistent overheating or coolant loss, re-evaluate hoses, water pump and radiator cap\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this product is for: this MITZONE thermostat housing assembly is aimed at owners and technicians working on 3.6L-equipped Buick, Cadillac, Chevrolet and GMC vehicles from the listed years who need a complete, direct-fit replacement. It’s a practical choice for scheduled maintenance, repair after a leak or crack in the original housing, or when updating the thermostat during broader cooling-system work. If you want a single-kit solution that replaces the housing, thermostat and gasket with parts matched for fit, this assembly streamlines repair and reduces the chance of missing pieces during installation.\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: Does this replace OE part 12673659?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. This MITZONE assembly is a direct replacement compatible with OE numbers 12673659 and 12678779 for listed 3.6L models.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are any sensors included with the housing?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. The kit contains the housing, thermostat, and gasket; any vehicle-specific sensors must be transferred or purchased separately.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"MITZONE","offers":[{"title":"Default Title","offer_id":48086053027998,"sku":"B0CLTMCDXJ","price":48.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/mitzone-thermostat-housing-front-view.jpg?v=1785883101","url":"https:\/\/northtrailauto.ca\/products\/mitzone-coolant-thermostat-housing-assembly-for-3-6l-buick-cadillac-chevy-gmc-2017-2023-complete-kit-with-thermostat-gasket","provider":"North Trail Auto","version":"1.0","type":"link"}