{"product_id":"c-tzu-aluminium-thermostat-housing-assembly-for-buick-lacrosse-regal-cadillac-xt5-xt6-gmc-acadia-2017-2023-corrosion-resist","title":"C-Tzu Aluminium Thermostat Housing Assembly for Buick LaCrosse\/Regal, Cadillac XT5\/XT6 \u0026 GMC Acadia (2017–2023) — Corrosion‑Resist","description":"\u003cp\u003e\u003cstrong\u003eC-Tzu's upgraded aluminium thermostat housing assembly replaces worn OEM units to control coolant flow and maintain engine operating temperature for select Buick, Cadillac and GMC models.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eEngine cooling components wear over time; this replacement thermostat housing assembly is built from premium aluminium to resist corrosion, tolerate higher temperatures, and prevent coolant leaks that can lead to engine overheating or inefficient performance. It fits Buick LaCrosse and Regal (2017–2020), Cadillac XT5 and XT6 (2017–2023) and GMC Acadia (2017–2023), and directly replaces part numbers such as 12678779 and 12673659. The unit is factory-tested and calibrated for reliable operation and offers a cost-effective alternative to dealer parts.\u003c\/p\u003e\n\n\u003ch3\u003eHow will this aluminium housing improve my vehicle's cooling reliability?\u003c\/h3\u003e\n\n\u003cp\u003eSwitching to an aluminium housing reduces corrosion risk compared with older copper or mixed-metal assemblies, helping maintain proper coolant routing and sealing. Improved material stability at high temperatures lowers the chance of cracks or deformation over time.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePremium aluminium shell for long-term corrosion resistance\u003c\/li\u003e\n  \u003cli\u003eEngineered sealing surfaces to minimize coolant leakage\u003c\/li\u003e\n  \u003cli\u003eHigh-temperature tolerance to withstand repeated thermal cycles\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs this an exact fit for my Buick, Cadillac, or GMC model?\u003c\/h3\u003e\n\n\u003cp\u003eThe assembly is manufactured to match OEM mounting points, hose connections, and thermostat specs for compatible vehicles, making installation straightforward for technicians or experienced DIYers. It replaces common OEM numbers so you can verify fit before purchase.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDirect replacement for 12678779, 12673659 and related OEM numbers\u003c\/li\u003e\n  \u003cli\u003eDesigned for Buick LaCrosse\/Regal 2017–2020; Cadillac XT5\/XT6 2017–2023; GMC Acadia 2017–2023\u003c\/li\u003e\n  \u003cli\u003eThermostat opens at 194°F (90°C), matching OEM thermal control\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat quality checks and performance assurances does this part have?\u003c\/h3\u003e\n\n\u003cp\u003eEach unit undergoes inspection and calibration during production to ensure dimensional accuracy and dependable thermostat operation. These factory tests reduce the likelihood of premature failure and confirm that the assembly routes coolant as intended.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIndividual testing and calibration at the manufacturing facility\u003c\/li\u003e\n  \u003cli\u003ePressure and leak checks to validate sealing integrity\u003c\/li\u003e\n  \u003cli\u003eMaterial verification for consistent thermal and corrosion resistance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does this part save money compared with buying from a dealer?\u003c\/h3\u003e\n\n\u003cp\u003eThis aftermarket option delivers OEM-equivalent fit and function while typically costing less than dealership parts. That lowers repair bills without sacrificing the materials or testing procedures needed for trusted performance.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLower price point than many dealer-sourced assemblies\u003c\/li\u003e\n  \u003cli\u003eComparable materials and factory quality checks included\u003c\/li\u003e\n  \u003cli\u003eReduced chance of repeat repairs thanks to durable aluminium construction\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Owners and mechanics looking to replace a failing thermostat housing on compatible Buick, Cadillac or GMC vehicles who want a durable, corrosion-resistant aluminium assembly that matches OEM specifications but costs less than dealership replacements. Suitable for professional installers and confident DIYers who verify OEM part numbers and vehicle year\/model compatibility before purchase.\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: Will this housing fit my 2018 Cadillac XT5?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — this C-Tzu aluminium thermostat housing is compatible with Cadillac XT5 models from 2017 through 2023; verify your OEM part number for a precise match.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What temperature does the thermostat open at?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The thermostat in this assembly opens at 194°F (90°C), matching the common OEM specification for the listed vehicles.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"C-Tzu","offers":[{"title":"Default Title","offer_id":48080851763358,"sku":"B0D3KRGLM6","price":69.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/c-tzu-front-view-thermostat-housing.jpg?v=1785790414","url":"https:\/\/northtrailauto.ca\/products\/c-tzu-aluminium-thermostat-housing-assembly-for-buick-lacrosse-regal-cadillac-xt5-xt6-gmc-acadia-2017-2023-corrosion-resist","provider":"North Trail Auto","version":"1.0","type":"link"}