{"product_id":"yeherit-coolant-expansion-reservoir-603-973-with-cap-direct-fit-pa-plastic-replacement-for-gm-trucks-suvs","title":"YEHERIT Coolant Expansion Reservoir 603-973 with Cap — Direct-Fit PA Plastic Replacement for GM Trucks \u0026 SUVs","description":"\u003cp\u003e\u003cstrong\u003eThe YEHERIT 603-973 coolant expansion reservoir tank with cap is a direct-fit replacement reservoir designed to restore proper coolant overflow control and pressure cycling for compatible GM trucks and SUVs.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf your vehicle is showing low-coolant warnings, visible leaks near the coolant neck, or inconsistent cabin heating, a worn or cracked expansion tank could be the cause. This replacement tank is molded from heat-resistant PA plastic, uses OE-equivalent mounting points and inlet\/outlet placements, and includes a matching cap to maintain system pressure. It is engineered to match factory dimensions and fluid flow behavior so you can swap it in without custom modifications.\u003c\/p\u003e\n\n\u003ch3\u003eWhich vehicles does this reservoir fit and how precise is the fit?\u003c\/h3\u003e\n\u003cp\u003eThis YEHERIT reservoir fits a range of GM full-size trucks and SUVs from model years 2014–2020, covering specific engine sizes and variants. It corresponds to several OE numbers for cross-reference, making part identification straightforward.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCadillac Escalade \/ Escalade ESV 2015–2020 — 6.2L\u003c\/li\u003e\n  \u003cli\u003eChevrolet Silverado 1500 2014–2019 — 4.3L \u0026amp; 5.3L; Silverado 1500 LD 2019 — 5.3L\u003c\/li\u003e\n  \u003cli\u003eChevrolet Suburban 2015–2020 — 5.3L, 6.0L, 6.2L; Suburban 3500 HD 2016–2019 — 6.0L\u003c\/li\u003e\n  \u003cli\u003eChevrolet Tahoe 2015–2020 — 5.3L \u0026amp; 6.2L\u003c\/li\u003e\n  \u003cli\u003eGMC Sierra 1500 2015–2019 — 4.3L, 5.3L, 6.2L; Sierra 1500 Limited 2019 — 5.3L\u003c\/li\u003e\n  \u003cli\u003eGMC Yukon \/ Yukon XL 2015–2020 (model years vary) — 5.3L \u0026amp; 6.2L\u003c\/li\u003e\n  \u003cli\u003eReplacement OE numbers: 603-973, 22856231, 671-00359, 603973, 3014134, 67100359\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does this tank affect cooling-system performance?\u003c\/h3\u003e\n\u003cp\u003eThe expansion tank manages surplus coolant when the engine warms, holding fluid under pressure and returning it to the radiator as temperatures fall. Using a correct, undamaged tank helps maintain stable system pressures and prevents air pockets, contributing to consistent temperature control.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHolds expanded coolant to avoid overflow and fluid loss\u003c\/li\u003e\n  \u003cli\u003eSupports pressure equalization so coolant flows back to the radiator\u003c\/li\u003e\n  \u003cli\u003eReduces risk of air intrusion that can cause hot spots or heater-core issues\u003c\/li\u003e\n  \u003cli\u003eWorks with the cap to maintain designed operating pressures\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and durability features does the YEHERIT unit offer?\u003c\/h3\u003e\n\u003cp\u003eConstructed from reinforced PA-grade plastic, the tank resists high under-hood temperatures and vibration. The material choice and molded mounting bosses are intended to endure the thermal cycles common in heavy-duty vehicle use.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePA plastic formulation resists heat and chemical exposure\u003c\/li\u003e\n  \u003cli\u003ePrecision-molded connections match factory hose and cap locations\u003c\/li\u003e\n  \u003cli\u003eEngineered to withstand vibration and thermal expansion cycles\u003c\/li\u003e\n  \u003cli\u003eIncludes a compatible pressure cap for correct sealing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs installation and after-sales support available if I need help?\u003c\/h3\u003e\n\u003cp\u003eYEHERIT provides a one-year unlimited-mileage guarantee on this expansion tank and offers customer support for fitment or installation questions. Basic replacement is a moderate DIY job for mechanically inclined owners, but professional installation is recommended if you're unsure.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOne-year unlimited-mileage warranty from YEHERIT\u003c\/li\u003e\n  \u003cli\u003eCustomer support response within 48 hours for questions\u003c\/li\u003e\n  \u003cli\u003eDirect-fit design reduces need for trimming or adapters\u003c\/li\u003e\n  \u003cli\u003eConsult vehicle service manual for safe coolant draining and refilling\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This YEHERIT expansion reservoir is aimed at owners or mechanics of compatible Chevrolet, GMC, and Cadillac trucks and SUVs who need a reliable replacement that matches OEM form and function. It's suitable for drivers noticing coolant loss, overheating indicators, or visible tank damage, and for anyone performing preventative cooling-system maintenance who wants a durable, OE-referenced component with warranty-backed support.\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 tank fit my 2016 Tahoe 5.3L?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The YEHERIT 603-973 is compatible with 2015–2020 Chevrolet Tahoe models equipped with 5.3L or 6.2L engines.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the tank include the pressure cap?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The product ships with a matching cap to ensure proper sealing and pressure control.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"YEHERIT","offers":[{"title":"Default Title","offer_id":48083390693534,"sku":"B0DSFZPNBB","price":59.89,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/yeherit-expansion-reservoir-front-view.jpg?v=1785832298","url":"https:\/\/northtrailauto.ca\/products\/yeherit-coolant-expansion-reservoir-603-973-with-cap-direct-fit-pa-plastic-replacement-for-gm-trucks-suvs","provider":"North Trail Auto","version":"1.0","type":"link"}