Gates 43274BH Engine Water Pump

Gates 43274BH Water Pump Overview

The Gates 43274BH engine water pump is a standard replacement for select Chevrolet and GMC trucks and vans from 2011-2016. It is built with a cast aluminum housing, plastic impeller, and reverse impeller rotation for the listed applications, with a pulley included and a back housing included for a direct-fit service replacement.

Gates Water Pump (Standard) components are built for OE-quality fit and consistent cooling-system operation. This part number, 43274BH, is engineered for vehicles that use an accessory belt drive and is listed for Chevrolet Express 2500, Chevrolet Express 3500, Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500 HD, GMC Savana 2500, GMC Savana 3500, GMC Sierra 2500 HD, and GMC Sierra 3500 HD.

Key Features

• Cast aluminum housing for strength and corrosion resistance
• Plastic impeller with reverse rotation design
• Includes back housing, metal gasket, and O-ring
• Pulley included for the listed application
• Accessory belt driven, not timing belt driven
• Thermostat and housing not included
• Fan clutch not included

Detailed Description

Gates 43274BH is a replacement engine water pump for 2011-2016 Chevrolet Express 2500, Chevrolet Express 3500, Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500 HD, GMC Savana 2500, GMC Savana 3500, GMC Sierra 2500 HD, and GMC Sierra 3500 HD. The cast aluminum housing and reverse-rotation plastic impeller match the requirements of the listed cooling-system applications, while the included back housing, metal gasket, and O-ring support a proper service installation. This part cross-references 943274BH and 12637105 for the same application.

Common Cooling System Issues

• Coolant leaks from a worn pump seal or casting surface
• Overheating caused by reduced coolant circulation
• Noise from worn pump bearings
• Poor coolant flow from impeller wear or damage
• Service replacement for a leaking or failing original water pump

Installation Notes

Verify reverse-rotation water pump requirements before installation. Confirm accessory belt drive routing, pulley alignment, and gasket sealing surfaces on the Chevrolet Silverado 2500 HD, GMC Sierra 3500 HD, and other listed applications. Replace coolant and inspect related cooling-system components during service to help ensure proper operation.

Quality Assurance

Gates states that its new water pumps are built from premium alloy materials and undergo functional testing of seals and bearings, along with leakage testing of the casting and assembled pump. The Gates 43274BH is offered as an OE-quality fit replacement for the listed vehicles.