Gates 18622 HVAC Heater Hose - Radiator To Reservoir

Gates 18622 Molded Heater Hose Overview

The Gates 18622 molded heater hose is an OEM-style coolant hose built for tight engine bays and radiator-to-reservoir routing. Its factory-molded shape helps maintain the correct path in applications where a straight hose will not match the original layout.

Compatible with a wide range of Chevrolet Silverado, GMC Sierra, Tahoe, Yukon, and Cadillac Escalade applications, this hose is made for coolant, water, and air service and is also approved for marine use.

Key Features

• EPDM construction for coolant-system service
• Factory-molded profile for a direct OE-style fit
• Small inside diameter of 12 mm at both ends
• 23 in. centerline length for radiator-to-reservoir routing
• Approved for coolant, water, air, and marine applications
• Fits compact engine compartments where formed routing is required

Product Details

Gates Molded Heater Hose 18622 is built around the original hose shape used in many GM truck and SUV cooling systems. The molded design helps preserve the intended routing between the radiator and reservoir, which is important in crowded engine compartments on Silverado, Sierra, Avalanche, Tahoe, Yukon, and Escalade models. This part cross-references Continental 62938 for the same application.

With EPDM material and matched 12 mm end diameters, the hose is suited for consistent coolant transfer in vehicles that require a formed replacement rather than a universal cut-to-fit hose. The Gates 18622 part number is commonly searched for radiator to reservoir heater hose replacement on GM platforms.

Common Uses

• Replacing a cracked or softened radiator-to-reservoir hose
• Restoring proper coolant routing on GM trucks and SUVs
• Addressing coolant seepage at a molded hose section
• Correcting fitment issues caused by a straight universal hose
• Servicing a hose that no longer holds its original formed shape

Installation Notes

Verify the hose route, centerline length, and 12 mm end diameters before installation. Compare the existing hose shape to the molded profile to confirm radiator-to-reservoir routing on your vehicle. Inspect adjoining fittings and clamps for wear, and replace any damaged sealing surfaces before installing the new hose.

Compatible With 1999-2012 Chevrolet Silverado 1500, Radiator To Reservoir; 2006-2012 Chevrolet Silverado 2500, Radiator To Reservoir; 2007-2012 Chevrolet Avalanche, Radiator To Reservoir; 2000-2012 GMC Sierra 1500, Radiator To Reservoir; and additional Silverado, Sierra, Tahoe, Yukon, and Escalade applications listed in fitment.

Quality Assurance

Gates is known for producing OE-style fluid transfer components, and this molded heater hose follows that approach with a factory-shaped design and EPDM construction for cooling-system service. Part number 18622 is built to match the specified application requirements for formed hose replacement.