Gates 21959 Radiator Coolant Hose - Upper

Gates 21959 Molded Coolant Hose Overview

The Gates 21959 molded coolant hose is an OEM-quality radiator coolant hose built for upper cooling system applications. Made from EPDM and formed to the correct molded shape, it helps restore proper coolant routing on select Buick, Oldsmobile, Pontiac, and Chevrolet vehicles.

Gates Molded Coolant Hose line covers upper, lower, bypass, heater, and other coolant hose applications with OE-style specifications. This makes Gates 21959 a practical replacement choice when you need a formed hose that matches the original routing and fit.

Key Features

• EPDM construction for coolant system service
• Molded design for accurate hose routing
• 1.31 in. inside diameter at both ends
• 16.2 in. centerline length
• No spring and no quick-connect fittings
• Upper hose application for select GM vehicles

Detailed Description

Gates 21959 is a molded radiator coolant hose engineered for upper hose positions on select 1992-1996 GM applications. It is listed for 1995 Buick Park Avenue, 1996 Buick LeSabre and Park Avenue, 1995-1996 Oldsmobile 88, 1995-1996 Oldsmobile 98, 1996 Oldsmobile LSS, 1995-1996 Pontiac Bonneville, and 1992-1993 Chevrolet Corsica. The molded shape supports the original hose path, while the EPDM material is suited for coolant service in the engine bay.

This part number, 21959, is part of Gates’ molded coolant hose line, which is built to cover a wide range of replacement cooling-system needs without requiring a trip to the OE dealer. This part cross-references Monroe Shocks & Struts (e.g., 71580) for the same application.

What It Helps Address

• Cracked or leaking upper radiator hose
• Collapsed or softened coolant hose material
• Incorrect hose routing after hose replacement
• Coolant loss from aged molded hose sections
• Fitment issues on select Buick, Oldsmobile, Pontiac, and Chevrolet upper hose applications

Installation Notes and Tips

Verify the vehicle year, make, model, and upper hose position before ordering Gates 21959. Compare the hose shape, end inside diameters, and centerline length to the original part to confirm proper routing. Inspect hose clamps, necks, and adjacent cooling components during replacement, and refill the cooling system with the correct coolant after installation.

Quality Assurance

Gates manufactures this molded coolant hose to OEM-quality specifications for direct replacement use in the cooling system. The EPDM construction and molded form support consistent fitment on the listed applications, including 1992-1993 Chevrolet Corsica, 1995 Buick Park Avenue, and 1996 Pontiac Bonneville upper hose positions.