Gates 21991 Radiator Coolant Hose - Lower

Gates 21991 Molded Coolant Hose Overview

Gates 21991 is a molded radiator coolant hose built for lower coolant routing on select Chevrolet, Pontiac, Buick, and Oldsmobile applications. It uses EPDM construction and OEM-style molded shaping to match the original hose path and help simplify radiator hose replacement.

The Gates Molded Coolant Hose line is built around application-specific fitment for upper, lower, bypass, heater, and other coolant circuits. For buyers searching for a lower radiator hose for a 2000-2001 Chevrolet Lumina or a 1997-2000 Oldsmobile Silhouette, this part number provides a direct replacement option.

Key Features

• Part number: 21991
• Brand: Gates Molded Coolant Hose
• EPDM rubber construction for coolant-system use
• Molded design for the specified hose routing
• 1.27 in. (32 mm) inside diameter at both ends
• 16.4 in. (417 mm) centerline length
• No spring and no quick-connect fittings
• Lower hose application for listed vehicles

Product Details

This molded coolant hose is made for lower radiator hose service where the original routing must be maintained. Gates 21991 follows OEM-quality specifications and is shaped for the listed vehicles, including 1992-1993 Buick Regal, 1992-1993 Chevrolet Lumina, 1992-1993 Oldsmobile Cutlass and Cutlass Supreme, 1992-1993 Pontiac Grand Prix, 1997-2001 Oldsmobile Silhouette, 1997-1999 Pontiac Trans Sport, 1998-2001 Pontiac Montana, 1998-1999 Chevrolet Lumina and Monte Carlo, and 1998 Pontiac Grand Prix. This part cross-references Dayco 71586 and Continental 61724 for the same application.

What It Helps Address

• Cracked or split lower radiator hose
• Coolant leaks at the hose body
• Incorrect hose routing after replacement
• Heat-related hose deterioration
• Fitment issues on molded lower hose applications

Installation Notes and Tips

Verify the vehicle year, make, model, and lower-hose application before ordering. Compare the original hose shape, end diameters, and centerline length to Gates 21991 before installation. Inspect hose clamps, mating necks, and nearby coolant components for wear or corrosion so the replacement hose seals properly.

Quality Assurance

Gates manufactures this molded coolant hose to OEM-quality specifications for the listed applications. The Gates molded coolant hose line is offered as a broad replacement source for radiator, heater, bypass, and other coolant hose needs.