{"product_id":"acdelco-engine-coolant-temperature-shut-down-switch-15-51107-19189478-oem-fit-durable-thermal-control","title":"ACDelco engine coolant temperature shut‑down switch 15-51107 (19189478) — OEM-fit, durable thermal control","description":"\u003cp\u003e\u003cstrong\u003eACDelco Gold 15-51107 (19189478) is an OEM-style engine coolant temperature shut‑down switch designed to monitor coolant temperature and trigger system shutdowns when factory thresholds are reached.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis ACDelco Gold temperature switch is a professional-grade aftermarket replacement built to match the original equipment’s fit and electrical characteristics for HVAC and engine thermal control circuits. It’s engineered to meet ACDelco’s standards for form, fit, and function so technicians and DIYers can restore proper operation to vehicles that use this switch without recalibrating wiring or mounting points.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this switch integrate with my vehicle’s HVAC and engine systems?\u003c\/h3\u003e\n\u003cp\u003eThe switch mounts in the coolant circuit or sensor boss where the original engine coolant temperature shut‑down device was located. It completes or interrupts the factory control circuit based on coolant temperature, sending a clear on\/off signal to the vehicle’s HVAC or engine shutdown control. Installation requires matching the connector and mounting thread to the original component.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDirect OEM-compatible replacement for the listed part numbers\u003c\/li\u003e\n  \u003cli\u003eSame thread size and mounting flange as factory unit\u003c\/li\u003e\n  \u003cli\u003eStandard electrical connector footprint for plug-and-play installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat performance and reliability features does the ACDelco Gold switch offer?\u003c\/h3\u003e\n\u003cp\u003eACDelco Gold components are made to professional aftermarket standards that emphasize durability and consistent switching behavior. The unit is built with materials and internal contacts suited to repeated thermal cycles without drift, helping maintain the same switching thresholds the vehicle was designed for. It’s intended to provide predictable operation under typical engine bay conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePremium materials to withstand heat and coolant exposure\u003c\/li\u003e\n  \u003cli\u003eRobust internal contacts for consistent electrical switching\u003c\/li\u003e\n  \u003cli\u003eManufactured to meet established fit, form, and function criteria\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I know this is the correct part for my car?\u003c\/h3\u003e\n\u003cp\u003eConfirm fitment by comparing the part number (ACDelco Gold 15-51107 or OEM 19189478) to your vehicle’s parts list, service manual, or existing switch. Check physical attributes—thread pitch, connector type, and overall length—against the original switch. If those match and the part number aligns, this ACDelco unit is intended as a direct replacement.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify part numbers: 15-51107 and OEM cross-reference 19189478\u003c\/li\u003e\n  \u003cli\u003eMatch electrical connector and thread dimensions to original switch\u003c\/li\u003e\n  \u003cli\u003eConsult vehicle service documentation for location and replacement instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I expect during installation and maintenance?\u003c\/h3\u003e\n\u003cp\u003eInstallation is straightforward for anyone comfortable working on cooling and electrical circuits: drain coolant as needed, remove the old switch, install the new unit with proper sealing, and reconnect the wiring harness. Use recommended thread sealant or washer per vehicle guidance and torque to spec. Periodic inspection of the connector and surrounding hose\/clamp areas helps ensure long-term reliability.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDrain coolant to a safe level before removal\u003c\/li\u003e\n  \u003cli\u003eUse correct thread sealant or replacement sealing washer\u003c\/li\u003e\n  \u003cli\u003eTighten to vehicle manufacturer torque specifications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The ACDelco Gold 15-51107 (19189478) is aimed at professional technicians and informed DIY mechanics replacing a factory coolant temperature shut‑down switch or restoring HVAC\/engine thermal control functionality. It’s suitable when you need an OEM-style replacement that matches original electrical and mounting characteristics without modifying vehicle wiring or controls.\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: Is this ACDelco switch a direct OEM replacement?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The Gold 15-51107 (19189478) is made to match OEM fit, thread, and connector specifications for direct replacement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need special tools to install the switch?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No special tools are required beyond basic hand tools, coolant drainage provisions, and a torque wrench to factory specs.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"ACDelco","offers":[{"title":"Default Title","offer_id":67589395349689,"sku":"B001DREIF2","price":81.29,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/acdelco-gold-switch-front-view.jpg?v=1790530030","url":"https:\/\/redleafauto.ca\/products\/acdelco-engine-coolant-temperature-shut-down-switch-15-51107-19189478-oem-fit-durable-thermal-control","provider":"Redleaf Auto","version":"1.0","type":"link"}