{"product_id":"yzusgomumu-603-861-coolant-expansion-reservoir-with-cap-fits-2016-2021-cadillac-xt4-xt5-xt6-blazer-equinox-acadia-terrain-lacrosse-regal-replaces-23386455","title":"YzusGomumu 603-861 Coolant Expansion Reservoir with Cap — Fits 2016-2021 Cadillac XT4\/XT5\/XT6, Blazer, Equinox, Acadia, Terrain, LaCrosse, Regal | Replaces 23386455","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eYzusGomumu 603-861 coolant expansion reservoir with cap is designed to support your cooling system across a wide range of driving conditions. By maintaining a steady coolant level, it helps your engine respond smoothly to warm days, cold starts, and spirited drives alike. This replacement part pairs a robust reservoir with a secure cap to keep the system sealed and efficient.\u003c\/p\u003e\n\u003ch3\u003eKey benefits\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eHelps maintain optimal engine temperature across daily commutes and demanding drives\u003c\/li\u003e\n  \u003cli\u003eSupports consistent coolant flow to reduce overheating-related symptoms\u003c\/li\u003e\n  \u003cli\u003eDurable construction made to withstand extreme temperature fluctuations and system pressure\u003c\/li\u003e\n  \u003cli\u003eCap included for a complete, ready-to-install replacement\u003c\/li\u003e\n  \u003cli\u003eOE reference 23386455 helps verify a correct fit for many GM models\u003c\/li\u003e\n  \u003cli\u003eCross-brand compatibility across Cadillac, Chevrolet, GMC, and Buick applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDurability and fit\u003c\/h3\u003e\n\u003cp\u003eThe unit’s rugged design emphasizes long-term reliability in the engine bay. It’s built from quality materials intended to resist cracking or warping under heat and vibration, while maintaining a tight seal to protect the cooling system from leaks.\u003c\/p\u003e\n\u003cp\u003eIn typical use, drivers may notice a steadier engine feel and a more predictable cooling rhythm. For hot climates or when hauling cargo, the reservoir supports sustained coolant circulation so the radiator can respond quickly to rising temps. This can translate to more confident throttle response and smoother idling during peak heat.\u003c\/p\u003e\n\u003ch3\u003eCompatibility and how to verify\u003c\/h3\u003e\n\u003cp\u003eCompatible with 2016-2021 Cadillac XT4\/XT5\/XT6, 2016-2021 Chevrolet Blazer\/Equinox, 2016-2021 GMC Acadia\/Terrain, and 2018-2020 Buick LaCrosse\/Regal Sportback; check OE number 23386455 to confirm a match.\u003c\/p\u003e\n\u003ch3\u003eWhat’s included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCoolant expansion reservoir tank\u003c\/li\u003e\n  \u003cli\u003eCap\u003c\/li\u003e\n\u003c\/ul\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: What vehicles are compatible with the YzusGomumu 603-861 Coolant Expansion Reservoir?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Fits 2016-2021 Cadillac XT4\/XT5\/XT6, Chevrolet Blazer\/Equinox, GMC Acadia\/Terrain, Buick LaCrosse\/Regal Sportback; verify OE 23386455.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the package include a cap and how durable is the reservoir?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, the cap is included; the reservoir is built to resist temperature changes and system pressure for reliable performance.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"YzusGomumu","offers":[{"title":"Default Title","offer_id":42468791713877,"sku":"B0DPBXJ9RR","price":51.69,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/3270\/4597\/files\/yzusgomumu-603-861-coolant-reservoir-with-cap.jpg?v=1778080907","url":"https:\/\/plentytorque.co.uk\/products\/yzusgomumu-603-861-coolant-expansion-reservoir-with-cap-fits-2016-2021-cadillac-xt4-xt5-xt6-blazer-equinox-acadia-terrain-lacrosse-regal-replaces-23386455","provider":"PlentyTorque","version":"1.0","type":"link"}