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field--name-field-product-description field--type-text-with-summary field--label-hidden field__item\u0022\u003E\u003Cp\u003EThe Merchant Automotive Water Pump Kit includes everything you need to replace the water pump on 2001-2005 Chevy Silverado and GMC Sierra 2500HD and 3500HD trucks with the LB7 and LLY 6.6 Liter Duramax diesel. It includes a new Gates water pump with cover, new water pump studs, all of the seals and gaskets for the job, and a Flywheel Lock so you can remove the harmonic balancer without pulling the starter.\u003C\/p\u003E\n\u003Cp\u003E\u003Cstrong\u003ENote:\u003C\/strong\u003E The crankshaft balancer bolt must be removed to replace the water pump. The factory bolt is a one-time-use bolt and must be replaced. It is not included in this kit. Order the Crankshaft Balancer Bolt with your kit.\u003C\/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EFeatures\u003C\/strong\u003E\u003C\/p\u003E\n\u003Cul\u003E\n\u003Cli\u003ENew OEM-style Gates water pump with cover, a direct replacement that restores factory-like function\u003C\/li\u003E\n\u003Cli\u003EAll necessary seals and gaskets included\u003C\/li\u003E\n\u003Cli\u003ETwo new OEM-style water pump studs\u003C\/li\u003E\n\u003Cli\u003EIncludes a Lisle flywheel lock to hold the engine while removing the balancer bolt\u003C\/li\u003E\n\u003Cli\u003EAll-in-one kit built for a complete Duramax water pump job\u003C\/li\u003E\n\u003C\/ul\u003E\n\u003Cp\u003E\u003Cstrong\u003EWhat\u0027s Included\u003C\/strong\u003E\u003C\/p\u003E\n\u003Cul\u003E\n\u003Cli\u003E(1) Water pump with cover\u003C\/li\u003E\n\u003Cli\u003E(1) Water pump to engine cover seal\u003C\/li\u003E\n\u003Cli\u003E(1) Bypass pipe seal\u003C\/li\u003E\n\u003Cli\u003E(1) Upper bypass pipe seal\u003C\/li\u003E\n\u003Cli\u003E(1) Water pump outlet gasket\u003C\/li\u003E\n\u003Cli\u003E(2) Water pump studs\u003C\/li\u003E\n\u003Cli\u003E(1) Flywheel Lock\u003C\/li\u003E\n\u003C\/ul\u003E\n\u003Cp\u003E\u003Cstrong\u003EWhy Replace It\u003C\/strong\u003E\u003C\/p\u003E\n\u003Cp\u003EWater pumps are a common wear item on every vehicle, including the Duramax. The water pump keeps coolant moving through the engine. As a Duramax ages, the factory water pump wears out, and skipping coolant flushes at the recommended intervals can cause it to fail early.\u003C\/p\u003E\n\u003Cp\u003EA failing water pump can lead to overheating and serious engine damage if it is not replaced in time.\u003C\/p\u003E\n\u003Cp\u003E\u003Cstrong\u003ESigns of a Failing Water Pump\u003C\/strong\u003E\u003C\/p\u003E\n\u003Cp\u003EMost water pumps show symptoms before they fail completely. Watch for:\u003C\/p\u003E\n\u003Cul\u003E\n\u003Cli\u003ECoolant leaking from the weep hole, a small hole in the pump designed to show when the seal is failing\u003C\/li\u003E\n\u003Cli\u003ERust or deposit buildup on the impeller in more advanced cases\u003C\/li\u003E\n\u003Cli\u003EA loose water pump pulley or a whining noise from the pump, which is less common\u003C\/li\u003E\n\u003Cli\u003EEngine overheating. The water pump is one of several things to check when diagnosing an overheating truck.\u003C\/li\u003E\n\u003C\/ul\u003E\n\u003Cp\u003E\u003Cstrong\u003EInstallation Tips\u003C\/strong\u003E\u003C\/p\u003E\n\u003Cul\u003E\n\u003Cli\u003EInstall the flywheel lock through the inspection opening on the bottom of the transmission to hold the engine while you remove the balancer bolt.\u003C\/li\u003E\n\u003Cli\u003EReplace the crankshaft balancer bolt. Do not reuse the old one.\u003C\/li\u003E\n\u003Cli\u003EClean all sealing surfaces before installing the new seals and gaskets.\u003C\/li\u003E\n\u003Cli\u003EFlush the cooling system and fill with the correct coolant after the new pump is installed.\u003C\/li\u003E\n\u003C\/ul\u003E\n\u003Cp\u003E\u003Cstrong\u003ERelated Parts\u003C\/strong\u003E\u003C\/p\u003E\n\u003Cul\u003E\n\u003Cli\u003ECrankshaft Balancer Bolt\u003C\/li\u003E\n\u003Cli\u003EWater Pump Kit, Duramax 2006-2016\u003C\/li\u003E\n\u003Cli\u003EWater Pump Kit, Duramax 2017-2025\u003C\/li\u003E\n\u003Cli\u003EWater Pump to Engine Cover Seal, Duramax\u003C\/li\u003E\n\u003C\/ul\u003E\n\u003Cp\u003E\u003Cstrong\u003EFrequently Asked Questions\u003C\/strong\u003E\u003C\/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EIs the crankshaft balancer bolt included?\u003C\/strong\u003E\u003C\/p\u003E\n\u003Cp\u003ENo. The balancer bolt is a one-time-use bolt and must be replaced. Order the Crankshaft Balancer Bolt separately.\u003C\/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EDo I need to remove the starter to hold the engine?\u003C\/strong\u003E\u003C\/p\u003E\n\u003Cp\u003ENot on trucks with the Allison automatic. The included flywheel lock goes in through the inspection opening on the bottom of the transmission, so the starter can stay in place. The flywheel lock does not fit trucks with the ZF6 manual transmission.\u003C\/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EWill this kit fit my 2006 or newer Duramax?\u003C\/strong\u003E\u003C\/p\u003E\n\u003Cp\u003ENo. Use our 2006-2016 Water Pump Kit or our 2017-2025 Water Pump Kit.\u003C\/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EShould I flush the coolant when I replace the water pump?\u003C\/strong\u003E\u003C\/p\u003E\n\u003Cp\u003EYes. Old coolant is a common cause of early water pump failure. Flush the system and refill with fresh coolant.\u003C\/p\u003E\n\u003Cp\u003EFor warranty information or to submit a claim, see our Warranty Form.\u003C\/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EDetails:\u003C\/strong\u003E\u003C\/p\u003E\n\u003Cul\u003E\n\u003Cli\u003EEngine Manufacturer: Duramax\u003C\/li\u003E\n\u003Cli\u003ELiter: 6.6 Liter\u003C\/li\u003E\n\u003Cli\u003EEngine Designation: LB7, LLY\u003C\/li\u003E\n\u003Cli\u003EEngine Years: 2001-2005\u003C\/li\u003E\n\u003C\/ul\u003E\n\u003Cp\u003E\u003Cstrong\u003EApplications:\u003C\/strong\u003E\u003C\/p\u003E\n\u003Cul\u003E\n\u003Cli\u003E2001-2004 Silverado\/Sierra 2500HD\/3500HD LB7\u003C\/li\u003E\n\u003Cli\u003E2004-2005 Silverado\/Sierra 2500HD\/3500HD LLY\u003C\/li\u003E\n\u003C\/ul\u003E\u003C\/div\u003E\n      \u003C\/article\u003E\n","dialogOptions":{"width":"80%","dialogClass":"product-quick-view","buttons":[],"modal":true,"title":"Water Pump Kit w Cover and Plastic Impeller, Duramax 2001-2005 Silverado\/Sierra 2500HD\/3500HD LB7\/LLY Merchant Automotive","classes":{"ui-dialog":"product-quick-view"}}}]