{"product_id":"gdukop-engine-coolant-expansion-reservoir-tank-w-cap-direct-fit-pa-plastic","title":"GDUKOP Engine Coolant Expansion Reservoir Tank w\/ Cap — Direct-Fit PA Plastic","description":"\u003cp\u003e\u003cstrong\u003eThe GDUKOP 603-054 engine coolant expansion reservoir tank with cap is a direct-fit replacement reservoir designed to restore proper coolant overflow storage and pressure relief for compatible Cadillac, Chevrolet and GMC models.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eWhen an aging or cracked coolant reservoir starts leaking or cannot hold pressure, your engine cooling system loses effectiveness. This replacement tank is molded from heat-resistant PA plastic and ships with a matching cap so you can return a 2007–2018 GM truck or SUV to reliable cooling operation without expensive dealer downtime. Below you’ll find quick answers to common buyer questions, clear specifics on fit and function, plus a brief summary of who benefits most from this part.\u003c\/p\u003e\n\n\u003ch3\u003eWhich GM vehicles will this reservoir fit?\u003c\/h3\u003e\n\u003cp\u003eThis expansion tank fits a wide range of GM full-size trucks and SUVs. Fitment covers many model years for Cadillac Escalade, Chevrolet Silverado, Suburban, Tahoe, Avalanche, and GMC Sierra and Yukon lines—confirm fit with your VIN or the OE numbers listed below.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCadillac: Escalade \/ Escalade ESV (2007–2014)\u003c\/li\u003e\n  \u003cli\u003eChevrolet: Silverado 1500 (2007–2013); Silverado 2500\/3500 (2010–2013); Suburban (2007–2013 and 2016); Tahoe (2007–2014); Avalanche\/Cheyenne (2007–2013)\u003c\/li\u003e\n  \u003cli\u003eGMC: Sierra \/ Sierra 1500 (2007–2013); Sierra 2500\/3500 (2007–2018); Yukon \/ Yukon XL (2007–2014)\u003c\/li\u003e\n  \u003cli\u003eReplacement OE references: 603-054, 22870828, 22797286, 15833723, 13502353, 797286\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does this tank help my cooling system perform better?\u003c\/h3\u003e\n\u003cp\u003eThe reservoir collects expanding coolant when the engine warms up and returns it to the radiator as the engine cools, maintaining the correct fluid level and reducing air introduction. Built from reinforced PA plastic, it resists high temperatures and vibration common in heavy-duty applications.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eStores surplus coolant to prevent overflow and loss of fluid\u003c\/li\u003e\n  \u003cli\u003eMaintains consistent pressure to reduce air pockets and hot spots\u003c\/li\u003e\n  \u003cli\u003eDurable construction limits cracking and premature replacement\u003c\/li\u003e\n  \u003cli\u003eIncludes a matching cap to restore pressure sealing and venting function\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the main technical and quality features?\u003c\/h3\u003e\n\u003cp\u003eGDUKOP engineered this reservoir for longevity in demanding operating conditions. The material selection and molding process prioritize thermal resistance and dimensional accuracy so the part installs like the original equipment.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eConstructed from PA (polyamide) plastic for heat and vibration resistance\u003c\/li\u003e\n  \u003cli\u003eOEM-style mounting points and hose connections for straightforward installation\u003c\/li\u003e\n  \u003cli\u003eShips with a compatible cap that vents and seals correctly under pressure\u003c\/li\u003e\n  \u003cli\u003eBacked by a one-year unlimited-mileage guarantee and responsive customer support\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow easy is it to replace the old reservoir myself?\u003c\/h3\u003e\n\u003cp\u003eReplacement is typically a straightforward task for a DIYer with basic tools: drain to safe level, unclip hoses and mounting fasteners, swap the tank and reconnect hoses, then refill and bleed the cooling system per manufacturer guidance.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMinimal mechanical skill required; common hand tools suffice\u003c\/li\u003e\n  \u003cli\u003eFollow vehicle-specific bleeding procedures to remove trapped air\u003c\/li\u003e\n  \u003cli\u003eInspect hoses and clamps during swap and replace if brittle or corroded\u003c\/li\u003e\n  \u003cli\u003eTest for leaks and proper coolant level after installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? If you own one of the compatible Cadillac, Chevrolet, or GMC trucks or SUVs and you’ve noticed coolant loss, visible cracks, cap failure, or coolant-system warnings, this GDUKOP 603-054 reservoir and cap combination offers a cost-effective, OEM-style replacement. It’s aimed at vehicle owners, independent mechanics, and fleet maintenance teams seeking a durable, direct-fit part that restores proper coolant overflow control and helps maintain engine temperature stability.\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 reservoir include the pressure cap?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The GDUKOP 603-054 package ships with the matching cap to restore sealing and venting function.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is this an exact replacement for my OE part number?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It replaces several OE numbers (603-054, 22870828, 22797286, 15833723, 13502353, 797286); verify fit with your VIN or part cross-reference.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"GDUKOP","offers":[{"title":"Default Title","offer_id":55168561316183,"sku":"B0FBM62N32","price":77.2,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/gdukop-reservoir-front-view_e6c1b76b-6ab3-4924-a597-f6cd4ab7f0e1.jpg?v=1790408297","url":"https:\/\/britishgarage.co.uk\/products\/gdukop-engine-coolant-expansion-reservoir-tank-w-cap-direct-fit-pa-plastic","provider":"British Garage","version":"1.0","type":"link"}