Gates 21588 Radiator Coolant Hose - Upper

Gates 21588 Molded Coolant Hose Overview

The Gates 21588 molded coolant hose is an OE-style radiator coolant hose built for upper cooling system service on select GM vehicles. It uses EPDM and plastic construction with molded routing to match the original hose shape for a direct replacement on applications such as Chevrolet Cavalier, Pontiac Sunbird, Buick Regal, and Pontiac Grand Prix.

Gates Molded Coolant Hose line is built to cover upper, lower, bypass, heater, and other coolant routing needs with OEM-quality specifications. Part number 21588 is part of that application-focused line for radiator and HVAC-compatible coolant and heater hose service.

Key Features

• Gates part number 21588
• Molded radiator coolant hose for upper hose applications
• EPDM and plastic construction
• 1.25 in. inside diameter at both ends
• 22.1 in. centerline length
• No spring and no quick-connect fittings
• Molded shape for routing that follows the original hose path

Detailed Product Description

This molded coolant hose is intended for direct replacement use on vehicles that require the original upper hose profile and dimensions. The 1.25-inch end diameters and 22.1-inch centerline length support proper fitment in cooling system layouts where a formed hose is required rather than a universal straight hose. For shoppers searching for a Chevrolet Cavalier upper radiator hose, Pontiac Sunbird coolant hose, or Buick Regal molded heater and radiator hose replacement, Gates 21588 provides the correct style for those applications.

Fits 1987-1994 Chevrolet Cavalier, Upper. Fits 1991-1994 Pontiac Sunbird, Upper. Fits 1988-1993 Buick Regal, Upper. Fits 1988-1993 Pontiac Grand Prix, Upper. Fits 1990-1993 Chevrolet Lumina, Upper. Fits 1988-1993 Oldsmobile Cutlass and Cutlass Supreme, Upper. Fits 1987-1988 Cadillac Cimarron, Upper.

This part cross-references Dayco 71314 and 71417 for the same application.

What It Helps Address

• Cracked or hardened upper radiator hose
• Coolant leaks at a molded hose section
• Incorrect hose routing after a previous repair
• Cooling system service on radiator and HVAC-compatible hose paths
• Replacement needs for aging OE-style coolant hose assemblies

Installation Notes and Tips

Verify end diameters, centerline length, and hose routing against the removed part before installation. Inspect mating necks, clamps, and nearby cooling system components for wear or corrosion, and confirm the hose follows the original molded path without twist or tension. This hose is listed for upper position applications only, so match the vehicle and position carefully before ordering.

Quality Assurance

Gates manufactures this molded coolant hose to OEM-quality specifications for the listed applications. The product line is built to cover a wide range of replacement cooling system needs while maintaining the formed shape and dimensions required for proper fit.