{"product_id":"silverado-sierra-coolant-reservoir","title":"Chevy Silverado Tahoe Avalanche GMC Sierra Yukon Coolant Reservoir Tank Replace 603-102 | BDFHYK","description":"\u003ch2\u003eBDFHYK Engine Coolant Expansion Reservoir Overflow Tank Replacement\u003c\/h2\u003e\n\u003cp\u003eThis BDFHYK engine coolant expansion reservoir overflow tank is designed as an OE-style replacement for selected Chevrolet, GMC, Cadillac, and Hummer trucks and SUVs. It is built for drivers who need to replace an aging, cracked, discolored, or leaking coolant reservoir while keeping fitment confirmation clear before purchase.\u003c\/p\u003e\n\u003cp\u003eA coolant reservoir helps provide a visible coolant level reference and supports normal coolant expansion and recovery within the vehicle cooling system. If your original tank is brittle, stained, cracked, or showing signs of coolant seepage, replacing it with the correct reservoir can help restore the cooling system layout to its intended configuration.\u003c\/p\u003e\n\u003ch3\u003eVehicle Fitment Reminder\u003c\/h3\u003e\n\u003cp\u003ePlease confirm your vehicle year, make, model, engine, and OE reference number before ordering. This coolant reservoir is designed for selected applications including 2002-2006 Chevrolet Avalanche, Tahoe, Silverado, Suburban 1500 \/ 2500 \/ 3500 HD Classic; 2003-2006 Cadillac Escalade, Escalade ESV, Escalade EXT; 2003-2009 Hummer H2; and 1999-2007 GMC Yukon XL \/ Sierra 1500 \/ 2500 \/ 3500 HD Classic.\u003c\/p\u003e\n\u003cp\u003eFitment may vary by trim, production year, engine configuration, and cooling system layout. Always compare the old reservoir shape, mounting points, hose connections, and OE number before installation.\u003c\/p\u003e\n\u003ch3\u003eOE \/ Interchange Reference\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e603-102\u003c\/li\u003e\n\u003cli\u003e15075118\u003c\/li\u003e\n\u003cli\u003e15203949\u003c\/li\u003e\n\u003cli\u003e15778386\u003c\/li\u003e\n\u003cli\u003e15778387\u003c\/li\u003e\n\u003cli\u003e15808715\u003c\/li\u003e\n\u003cli\u003e15808716\u003c\/li\u003e\n\u003cli\u003e19353731\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eOE numbers are provided for fitment comparison only. Please verify that one of these numbers matches your original part or your vehicle parts catalog before ordering.\u003c\/p\u003e\n\u003ch3\u003eCommon Replacement Signs\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eVisible cracks, yellowing, or brittle plastic on the original reservoir\u003c\/li\u003e\n\u003cli\u003eCoolant stains, damp areas, or seepage around the tank body or hose connection points\u003c\/li\u003e\n\u003cli\u003eRepeated low coolant level after topping off\u003c\/li\u003e\n\u003cli\u003eSweet coolant smell after driving\u003c\/li\u003e\n\u003cli\u003eCoolant puddles under the vehicle after parking\u003c\/li\u003e\n\u003cli\u003eDifficulty reading the coolant level through the original tank\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese symptoms can also be related to other cooling system parts such as hoses, radiator cap, thermostat, water pump, or radiator. A full cooling system inspection is recommended if coolant loss continues after replacement.\u003c\/p\u003e\n\u003ch3\u003eProduct Features \u0026amp; Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Engine coolant expansion reservoir \/ coolant overflow tank\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e BDFHYK\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e PP material, based on current product specification\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplacement Style:\u003c\/strong\u003e OE-style replacement for selected vehicle applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Function:\u003c\/strong\u003e Helps provide coolant expansion space and visible coolant level reference\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment Method:\u003c\/strong\u003e Confirm by vehicle year, make, model, engine, old part shape, and OE number\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e BDDLZ-BD-05-07264\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eBefore You Buy\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eConfirm your vehicle is within the listed fitment range.\u003c\/li\u003e\n\u003cli\u003eCompare your original reservoir with the product images.\u003c\/li\u003e\n\u003cli\u003eCheck the hose connection locations and mounting points.\u003c\/li\u003e\n\u003cli\u003eVerify the OE or interchange number when available.\u003c\/li\u003e\n\u003cli\u003eConfirm whether your original setup requires a specific cap, sensor, or hose arrangement.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf your vehicle has been modified or the cooling system has been replaced before, compare the old part carefully before installation.\u003c\/p\u003e\n\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInstall only when the engine is fully cool.\u003c\/li\u003e\n\u003cli\u003eDo not open the cooling system while it is hot or pressurized.\u003c\/li\u003e\n\u003cli\u003eCheck all hoses and clamps during installation.\u003c\/li\u003e\n\u003cli\u003eRefill coolant according to the vehicle manufacturer's recommended procedure.\u003c\/li\u003e\n\u003cli\u003eBleed air from the cooling system if required by your vehicle service procedure.\u003c\/li\u003e\n\u003cli\u003eProfessional installation is recommended if you are not familiar with cooling system service.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003ch4\u003eHow do I know if this coolant reservoir fits my vehicle?\u003c\/h4\u003e\n\u003cp\u003eCheck your year, make, model, engine, old reservoir shape, mounting points, hose connections, and OE number. Do not rely on the model name alone.\u003c\/p\u003e\n\u003ch4\u003eCan a cracked coolant reservoir cause low coolant?\u003c\/h4\u003e\n\u003cp\u003eYes. A cracked or leaking reservoir can allow coolant loss. However, low coolant can also come from hoses, radiator, water pump, thermostat housing, or other cooling system components.\u003c\/p\u003e\n\u003ch4\u003eDoes this part fix engine overheating?\u003c\/h4\u003e\n\u003cp\u003eThis part is a coolant reservoir replacement. It may help replace a damaged or leaking tank, but overheating can have multiple causes. Inspect the full cooling system if overheating continues.\u003c\/p\u003e\n\u003ch4\u003eIs professional installation required?\u003c\/h4\u003e\n\u003cp\u003eProfessional installation is recommended, especially if the vehicle has repeated coolant loss, overheating, air trapped in the cooling system, or other cooling system issues.\u003c\/p\u003e\n\u003ch3\u003eAbout BDFHYK\u003c\/h3\u003e\n\u003cp\u003eBDFHYK focuses on OE-style replacement parts that help drivers move from vehicle symptoms to the right replacement part with less guesswork. Please contact us if you need help checking fitment before ordering.\u003c\/p\u003e","brand":"BDFHYK","offers":[{"title":"Default Title","offer_id":52592027730195,"sku":"BDDLZ-BD-05-07264","price":53.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0936\/6110\/2355\/files\/61Pp5EQGPQL._AC_SL1500.jpg?v=1762337572","url":"https:\/\/bdfhyk.com\/products\/silverado-sierra-coolant-reservoir","provider":"BDFHYK","version":"1.0","type":"link"}