{"product_id":"a-premium-radiator-coolant-expansion-tank-with-15-psi-cap-sensor-direct-fit-for-gm-trucks-and-suvs","title":"A-Premium Radiator Coolant Expansion Tank with 15 PSI Cap \u0026 Sensor — Direct-Fit for GM Trucks and SUVs","description":"\u003cp\u003e\u003cstrong\u003eThe A-Premium Radiator Coolant Expansion Reservoir Overflow Tank is a direct-fit replacement coolant recovery tank that includes a pressure cap and sensor for compatible GM trucks and SUVs.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis replacement overflow tank is designed to restore proper coolant containment and pressure regulation in older GM full-size trucks and SUVs. Molded from heat-resistant PA plastic and supplied with a spring-loaded 15 PSI cap plus a sensor and tubing, it helps maintain the vehicle's cooling system performance after the original tank becomes cracked, leaky, or sensor-faulty. The unit is engineered as a direct-fit service part for many Cadillac, Chevrolet, GMC and Hummer models from the late 1990s through the 2000s.\u003c\/p\u003e\n\n\u003ch3\u003eWhich vehicles will this reservoir fit?\u003c\/h3\u003e\n\u003cp\u003eCompatibility covers a wide range of GM platforms—mainly full-size pickups and SUVs produced between the late 1990s and mid-2000s. Before ordering, confirm your exact year, make and model against the reference numbers provided to ensure fitment.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCadillac Escalade 2002–2006\u003c\/li\u003e\n  \u003cli\u003eChevrolet Avalanche 1500 \/ Silverado \/ Suburban \/ Tahoe 1999–2006 (varies by model)\u003c\/li\u003e\n  \u003cli\u003eGMC Sierra \/ Yukon \/ Yukon XL 1999–2006 (varies by model)\u003c\/li\u003e\n  \u003cli\u003eHummer H2 2003–2009\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does it restore proper cooling system function?\u003c\/h3\u003e\n\u003cp\u003eThe replacement tank returns the cooling system to its designed expansion and recovery behavior, preserving coolant volume and allowing the system to vent and reclaim fluid as temperatures change. The included 15 PSI spring-loaded cap helps maintain correct system pressure while the sensor provides a signal for level monitoring or warning lights.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePressurized design rated to 15 PSI for proper system sealing\u003c\/li\u003e\n  \u003cli\u003eIncludes cap, sensor and tubing for a complete swap\u003c\/li\u003e\n  \u003cli\u003eTwo mounting holes for secure OEM-style installation\u003c\/li\u003e\n  \u003cli\u003eSensor restores level\/diagnostic feedback to the vehicle\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and build details should I expect?\u003c\/h3\u003e\n\u003cp\u003eThe tank is molded from durable PA (polyamide) plastic chosen for thermal stability and vibration resistance under engine-bay conditions. The assembly ships with matching components to minimize additional purchases and simplify the repair job.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHeat-resistant PA plastic construction\u003c\/li\u003e\n  \u003cli\u003eSpring-loaded twist cap type for reliable sealing\u003c\/li\u003e\n  \u003cli\u003eIncludes one reservoir, one cap, one sensor, and one tubing piece\u003c\/li\u003e\n  \u003cli\u003eTwo pre-drilled mounting points for straightforward replacement\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I confirm this is the correct part for my truck?\u003c\/h3\u003e\n\u003cp\u003eCompare the listed reference numbers and the vehicle fitment list with your vehicle’s year, make and model. Use the seller’s \"Year\/Make\/Model\" selection tool or consult your service manual to verify compatibility before purchase.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReference numbers: 603-102, 19353731, 10188034, and others\u003c\/li\u003e\n  \u003cli\u003eConfirm fit via the Year\/Make\/Model selector or part lookup\u003c\/li\u003e\n  \u003cli\u003eInspect mounting hole count and cap style against the old tank\u003c\/li\u003e\n  \u003cli\u003eContact the seller with VIN or part number for final verification\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This A-Premium coolant reservoir is intended for owners, DIY mechanics and professional shops replacing aged or damaged coolant expansion tanks on compatible Cadillac, Chevrolet, GMC and Hummer models. It's a practical choice when the original tank leaks, the level sensor fails, or the cap no longer holds pressure. Technically inclined buyers will appreciate the included sensor, cap and tubing that let you complete the repair in a single purchase, while shops benefit from a direct-fit aftermarket option covered by a one-year unlimited-mileage guarantee.\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 tank include the pressure cap and sensor?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The unit ships with the 15 PSI spring-loaded cap, level sensor, and tubing for a complete replacement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use this on a 2004 Silverado 1500?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, it lists compatibility with many Silverado 1500 models from 1999–2006; verify via your year\/make\/model selector.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"A-Premium","offers":[{"title":"Default Title","offer_id":55169925611863,"sku":"B07SQPY8FJ","price":90.59,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/a-premium-reservoir-front-view_9d8c6aa9-81d2-4644-b8f1-2c830562eb31.jpg?v=1790423412","url":"https:\/\/britishgarage.co.uk\/products\/a-premium-radiator-coolant-expansion-tank-with-15-psi-cap-sensor-direct-fit-for-gm-trucks-and-suvs","provider":"British Garage","version":"1.0","type":"link"}