BCBC MWP-502 Engine Water Pump

Engine Water Pump Overview

Melling MWP-502 is a standard replacement engine water pump built for stock cooling-system applications. It is made in the USA and engineered for dependable performance with leak testing performed under conditions that simulate real engine operation.

Compatible with a wide range of Chevrolet Silverado, GMC Sierra, and Cadillac Escalade applications, this water pump is specified for vehicles using a 2.05 inch (52 mm) thermostat and stock configuration. The MWP-502 part number is a direct reference for buyers searching for a replacement water pump for GM truck and SUV cooling systems.

• Standard replacement water pump for stock cooling-system service
• Cast aluminum housing with a steel impeller
• Serpentine belt drive with bolted attachment
• Includes pulley and gasket/seal components as listed in the product data
• Individually leak tested for operating-condition verification

Fitment Details

Fits 1999-2006 Chevrolet Silverado 1500, N/A. Fits 2001-2006 Chevrolet Silverado 2500 HD, N/A. Fits 2001-2006 Chevrolet Silverado 3500, N/A. Fits 2000-2006 Chevrolet Tahoe, N/A. Fits 2000-2006 GMC Yukon, N/A. Fits 2002-2006 Cadillac Escalade, N/A. Fits 2003-2006 GMC Savana 3500, N/A. Fits 2005-2006 GMC Envoy, N/A. Fits 2006-2011 Workhorse W42, N/A.

Additional fitment includes Chevrolet Avalanche 1500, Express 1500/2500/3500, Suburban 1500/2500, Trailblazer, Trailblazer EXT, W3500 Tiltmaster, GMC Sierra 1500/2500/3500, Yukon XL 1500/2500, Envoy XL, Envoy XUV, Hummer H2, Isuzu Ascender, and Saab 9-7x in the listed model years. The MWP-502 part number is also used across multiple cross-reference applications for the same cooling-system setup.

What This Water Pump Helps Address

• Coolant circulation issues caused by a worn pump
• Leakage from a failing pump housing or seal area
• Noise or rough operation from an aging mechanical pump
• Overheating concerns tied to reduced coolant flow
• Cooling-system service on stock GM truck and SUV applications

Installation Notes

Verify thermostat size and stock configuration before ordering, since fitment is listed for applications with a 2.05 inch (52 mm) thermostat. This pump uses a serpentine belt drive and bolted mounting, so matching the existing belt routing and accessory layout is important during installation. The product data lists no mounting hardware, instructions, or installation tool included.

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-502 is built to standard replacement specifications using cast aluminum, a steel impeller, and OEM flow-rate targeting for consistent cooling-system service.