Gates 21724 Radiator Coolant Hose - Coolant Pump-1 To Thermostat

Gates Molded Coolant Hose 21724

Gates 21724 is a molded radiator coolant hose built to OEM-quality specifications for coolant pump-to-thermostat routing and other cooling system applications. The EPDM construction and formed shape help match the original hose path for service on vehicles such as the Chevrolet Silverado 1500, Tahoe, and GMC Sierra 1500.

Key Features

• EPDM rubber construction for coolant system use
• Molded shape for a factory-style hose route
• End inside diameters: 18 mm (.69 in) and 21 mm (.81 in)
• Centerline length: 102 mm (4 in)
• No spring, no modular sections, and no quick-connect fittings
• Direct replacement style for upper, lower, bypass, heater, and related coolant applications

Product Details

This Gates molded coolant hose is part of the Molded Coolant Hose line, which covers a wide range of radiator hose replacement needs with OE-style fitment and dimensions. Part number 21724 is listed for multiple GM applications, including 2009-2013 Cadillac Escalade, 2009-2013 Chevrolet Silverado 1500, 2008-2013 Chevrolet Tahoe, 2009-2013 GMC Sierra 1500, and 2008-2013 GMC Yukon in the coolant pump-1 to thermostat position. This part cross-references Four Seasons 63031 for the same application.

Common Problems This Hose Can Address

• Cracked or hardened coolant hose material
• Coolant leaks at a worn hose section
• Incorrect hose routing after prior repairs
• Heat-related swelling or collapse in the cooling circuit
• Fitment issues from using a universal hose in a formed application

Installation Notes and Tips

Verify the hose route, end diameters, and coolant pump-to-thermostat position before installation. Drain coolant as needed, inspect adjoining fittings and clamps for wear, and confirm the hose follows the original molded path without twisting. For fitment reference, Gates 21724 is also listed for 1987 Buick Century, 1987 Chevrolet Celebrity, 1987 Oldsmobile Cutlass, 1987 Oldsmobile Cutlass Ciera, 1987 Oldsmobile Cutlass Cruiser, and 1987 Pontiac 6000.

Quality Assurance

Gates manufactures this molded coolant hose to OEM-quality specifications for radiator hose replacement service. The molded EPDM design supports accurate fitment across the listed applications, including Chevrolet Silverado 1500, Tahoe, and GMC Sierra 1500 cooling system repairs.