{"product_id":"dorman-603-5570-engine-coolant-reservoir","title":"Dorman 603-5570 Engine Coolant Reservoir","description":"\u003ch2\u003eEngine Coolant Reservoir Replacement\u003c\/h2\u003e\u003cp\u003eDorman 603-5570 is a replacement engine coolant reservoir built from plastic to handle underhood heat and engine vibration. It is engineered to match the original fit and function for service on compatible applications, including Chevrolet Silverado and GMC Sierra cooling system repairs.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDirect replacement engine coolant reservoir for OE-style fit and function\u003c\/li\u003e\n\u003cli\u003ePlastic construction with black and natural finish\u003c\/li\u003e\n\u003cli\u003ePressurized design with a spring-loaded twist cap\u003c\/li\u003e\n\u003cli\u003eCap pressure rating: 15 psi\u003c\/li\u003e\n\u003cli\u003eLevel sensor included for reservoir monitoring\u003c\/li\u003e\n\u003cli\u003eMounting brackets included; mounting hardware not included\u003c\/li\u003e\n\u003cli\u003eIrregular shape with 4 mounting holes and 4 mounting points\u003c\/li\u003e\n\u003cli\u003eWorking capacity: 5.9 L; maximum capacity: 7.5 L\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eThis Dorman coolant reservoir, part number 603-5570, is manufactured to replace a damaged or aging expansion tank in the engine cooling system. The reservoir is pressurized and includes a spring-loaded twist cap, helping maintain proper coolant storage and system operation in vehicles that use this style of tank. The integrated level sensor provision supports coolant level monitoring, while the OE-grade construction helps it match the original part’s fit and function. For shoppers searching for a Chevrolet Silverado coolant reservoir replacement or GMC Sierra coolant reservoir replacement, 603-5570 provides a direct-service solution for the cooling system.\u003c\/p\u003e\u003cp\u003eThis part cross-references Dorman 603-5570 for the same application.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCracked or leaking coolant reservoir housing\u003c\/li\u003e\n\u003cli\u003eLow coolant warnings caused by reservoir damage or sensor issues\u003c\/li\u003e\n\u003cli\u003eCoolant loss from a worn cap or tank seal area\u003c\/li\u003e\n\u003cli\u003eHeat-related plastic fatigue in the expansion tank\u003c\/li\u003e\n\u003cli\u003eCooling system service needs on Chevrolet Silverado and GMC Sierra applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify reservoir shape, mounting points, cap style, and sensor connection before installation. Transfer any required components from the original setup if the vehicle configuration calls for them, and inspect hoses, clamps, and the radiator cap area for wear before refilling the cooling system. After installation, refill with the correct coolant mixture and bleed air from the system according to the vehicle service procedure.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eDorman manufactures this reservoir from quality materials to withstand heat and vibration in the engine bay. It is built as an OE-style replacement for dependable fitment on the intended applications.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":52778771382453,"sku":"FKCX-603-5570","price":308.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/RB_6035570_Fro.jpg?v=1783577531","url":"https:\/\/www.partcatalog.com\/products\/dorman-603-5570-engine-coolant-reservoir","provider":"PartCatalog","version":"1.0","type":"link"}