Gates 45073 Engine Water Pump

Gates 45073 Water Pump Overview

The Gates 45073 engine water pump is a standard replacement for select Chevrolet and GMC applications that need reliable coolant circulation and OE-style fitment. Built with a cast aluminum housing, stamped steel impeller, and pulley included, it supports accessory-belt driven cooling systems with reverse impeller rotation.

Compatible with 2018-2024 Chevrolet Express 2500 and Express 3500, plus 2018-2023 GMC Savana 2500 and Savana 3500, this Gates Water Pump (Standard) line is built for direct replacement service on vehicles that demand consistent cooling performance. It also cross-references Four Seasons 45073 and GMB 130-3160 for the same application.

Key Features

• Brand: Gates Water Pump (Standard), part number 45073
• Cast aluminum housing for durable cooling-system service
• Stamped steel impeller with reverse rotation
• Pulley included for accessory belt drive systems
• Thermostat and housing included
• Water pump and metal gasket included
• 100 percent functional testing of seals and bearings
• 100 percent leakage testing of the casting and assembled pump

Detailed Product Description

Gates 45073 is an engine water pump engineered for direct replacement in select Chevrolet Express, Chevrolet Silverado 1500, GMC Savana, and GMC Sierra 1500 applications. The standard water pump design uses premium alloy materials and is manufactured to OE-quality fit standards, with attention to seal integrity, bearing function, and leak resistance. The reverse-rotation impeller and accessory-belt drive type make it important to match the original cooling-system configuration during service.

The Gates Water Pump (Standard) product line focuses on dependable cooling-system operation for everyday repair work. For technicians and parts buyers searching for a water pump for 2019 Chevrolet Silverado 1500, 2021 GMC Sierra 1500, or a 2018-2024 Chevrolet Express 3500 water pump replacement, this part number provides a direct-fit option with the thermostat and housing included.

Common Problems This Part Helps Address

• Coolant leaks from a worn pump casting or seal area
• Overheating caused by reduced coolant circulation
• Bearing noise from a failing water pump assembly
• Impeller wear that lowers cooling-system efficiency
• Service issues on reverse-rotation, accessory-belt driven cooling systems

Installation Notes and Tips

• Verify reverse impeller rotation before installation.
• Confirm accessory-belt drive configuration and pulley alignment.
• Inspect mating surfaces and replace the metal gasket during service.
• Check thermostat, hoses, and coolant condition while the system is open.
• Use the vehicle-specific fitment data for 2018-2024 Chevrolet Express 2500, 2018-2024 Chevrolet Express 3500, 2018-2023 GMC Savana 2500, 2018-2023 GMC Savana 3500, 2019-2021 Chevrolet Silverado 1500, and 2019/2021 GMC Sierra 1500 applications.

Quality Assurance

Gates manufactures this water pump with premium alloy materials and tests each unit for seal and bearing function as well as leakage at both the casting and assembled pump stage. That process supports consistent OE-quality fit and dependable service for the listed Chevrolet and GMC applications.