BCBC MWP-501 Engine Water Pump

Engine Water Pump for GM Truck Applications

The Melling MWP-501 engine water pump is a standard replacement part built for a wide range of Chevrolet, GMC, Cadillac, Hummer, Buick, and Saab applications. It is engineered for stock-style cooling performance and is individually leak tested to help verify sealing under operating conditions.

Key Features

• Standard replacement water pump for GM truck and SUV cooling systems
• Cast aluminum housing with a steel impeller
• Mechanical, belt-driven design with serpentine belt drive
• Pulley included; bolted attachment method
• Multi-layer steel gasket material with gasket or seal included
• Made in the USA and assembled to production standards

Detailed Description

The Melling MWP-501 is an engine water pump designed for stock replacement use in GM platforms that include Chevrolet Express, Silverado, Suburban, Tahoe, GMC Savana, Sierra, Yukon, Cadillac Escalade, and related models. Fitment includes applications such as Fits 2007-2013 Chevrolet Silverado 1500, N/A, Fits 2007-2014 Chevrolet Tahoe, N/A, and Fits 2007-2019 GMC Sierra 3500 HD, N/A, all with the specified thermostat note in the fitment data. The pump uses a cast aluminum body, steel impeller, and 7-vane impeller design to support OEM flow rate requirements.

Part number MWP-501 is built with a bolted mounting style, 6 mounting holes, and a serpentine belt drive layout. The included pulley, shaft, and tube components align with the pump’s mechanical design, while the natural/coated finish and leak-tested construction support consistent service replacement. This part cross-references Airtex AW6009 and Four Seasons 45010 for the same application.

What It Is Used For

• Restoring coolant circulation when the original pump is worn or leaking
• Replacing a noisy or inefficient mechanical water pump
• Addressing overheating caused by reduced coolant flow
• Replacing a pump with damaged impeller or housing components
• Servicing stock cooling systems on GM trucks and SUVs

Installation Notes and Tips

Confirm thermostat size and application notes before installation, since the listed fitments specify a 1.99 inch (50.6 mm) thermostat. The pump is a mechanical, belt-driven unit with a serpentine belt drive and bolted attachment method. MWP-501 is listed without mounting hardware, so verify all required service parts during removal and reassembly.

Quality Assurance

Melling manufactures this water pump in the USA and leak tests each unit under conditions intended to duplicate engine operating conditions. The MWP-501 is assembled from high-quality materials and built to standard replacement specifications for GM cooling system service.