Gates 24477 Radiator Coolant Hose - Heater Outlet or Heater To Reservoir

Gates Molded Coolant Hose for GM HD Applications

Gates Part Number 24477 is a molded radiator coolant hose built for specific GM heavy-duty cooling system applications. It follows OE-style routing and integrates the branch and female quick connector needed for the listed heater outlet and heater-to-reservoir positions.

• Molded coolant hose construction for application-specific routing
• Material blend of EPDM, plastic, and steel for cooling system service
• Includes one branch and one quick-connect fitting
• OE-style modular hose design with integrated components
• Direct replacement for select Chevrolet Silverado, GMC Sierra, Savana, and Express models

Modular Hose Line Details

This Gates Molded Coolant Hose comes from the Gates Modular Coolant Hose line, which is built around application-specific assemblies rather than universal hose shapes. The design mirrors OEM-style layouts and incorporates essential integrated components such as branches and quick connectors, helping maintain the original coolant hose routing on vehicles like the Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500 HD, and GMC Sierra 2500 HD. Part number 24477 is intended for the heater outlet and heater-to-reservoir locations shown in the fitment data.

This part cross-references Bosch 17126 for the same application.

Vehicle Fitment

• Fits 2019 Chevrolet Silverado 2500 HD, Heater Outlet
• Fits 2019 Chevrolet Silverado 3500 HD, Heater Outlet
• Fits 2015-2019 GMC Sierra 2500 HD, Heater To Reservoir
• Fits 2015-2019 GMC Sierra 3500 HD, Heater To Reservoir
• Fits 2015-2018 Chevrolet Silverado 2500 HD, Heater To Reservoir
• Fits 2015-2018 Chevrolet Silverado 3500, Heater To Reservoir
• Fits 2015-2018 Chevrolet Silverado 3500 HD, Heater To Reservoir
• Fits 2015-2016 GMC Savana 2500, Heater To Reservoir
• Fits 2015-2016 GMC Savana 3500, Heater To Reservoir
• Fits 2015 Chevrolet Express 2500, Heater To Reservoir
• Fits 2015 Chevrolet Express 3500, Heater To Reservoir

What This Hose Helps Address

• Coolant leaks from a cracked or aged molded hose
• Heat-related hose softening, swelling, or collapse
• Damaged quick-connect or branch-style hose routing
• Loss of proper coolant flow between heater and reservoir circuits
• Fitment issues caused by using a non-matching universal hose

Installation Notes

Verify the vehicle year, make, model, and coolant hose position before installation. Compare the original hose routing, branch location, and quick-connector style to the replacement part number 24477 to confirm match-up with the existing cooling system layout. Inspect adjoining fittings and sealing surfaces for wear or contamination before installing the new hose.

Quality Assurance

Gates is a recognized aftermarket supplier in modular coolant hose assemblies, and this hose is manufactured to application-specific OE-style requirements for the listed GM vehicles. The molded construction and integrated components are selected to match the original routing and connection points used in the cooling system.