Gates 23721 Radiator Coolant Hose - Upper

Gates 23721 Upper Radiator Coolant Hose

The Gates Molded Coolant Hose 23721 is an upper radiator coolant hose built to OEM-quality specifications for select heavy-duty Chevrolet and GMC trucks. It is formed from EPDM for dependable coolant routing and a precise molded shape that matches the original hose path.

Compatible with 2011-2014 Chevrolet Silverado 2500 HD and Silverado 3500 HD, as well as 2011-2014 GMC Sierra 2500 HD and Sierra 3500 HD, this hose supports direct replacement service for upper cooling system repairs. Gates 23721 is part of the Molded Coolant Hose line, which covers upper, lower, bypass, heater, and other coolant applications.

Key Features

• EPDM construction for coolant system use
• Molded design for the upper hose routing
• 1.75 in. inside diameter at both ends
• 24.7 in. centerline length
• No spring and no quick-connect fittings
• Direct-fit replacement for select Silverado HD and Sierra HD applications

Product Details

This radiator coolant hose is engineered for the upper position and follows the original molded profile needed in the cooling circuit. The Gates Molded Coolant Hose line is built to cover a wide range of replacement needs while maintaining OEM-style fit and dimensions. For buyers searching for a 2011-2014 Chevrolet Silverado 2500 HD upper radiator hose or a 2011-2014 GMC Sierra 3500 HD coolant hose, part number 23721 provides a focused replacement option.

This part cross-references Dayco 72554 for the same application.

What It Helps Fix

• Cracked or split upper radiator hose
• Coolant leaks at the hose body
• Collapsed or softened hose material
• Incorrect hose routing after prior repairs
• Cooling system service on Silverado HD and Sierra HD trucks

Installation Notes and Tips

Verify the upper hose routing, end diameters, and centerline length before installation. Inspect hose clamps, radiator necks, and engine connections for wear or corrosion, and replace damaged mating surfaces as needed. Confirm the vehicle application by year, make, model, and upper position before ordering Gates 23721.

Quality Assurance

Gates manufactures this molded coolant hose to OEM-quality specifications for replacement use in the cooling system. The molded construction and EPDM material support consistent fitment for the listed Chevrolet Silverado HD and GMC Sierra HD applications.