Gates 20931 Radiator Coolant Hose - Lower

Gates 20931 Molded Coolant Hose Overview

The Gates 20931 molded coolant hose is an OE-style radiator coolant hose built for lower cooling-system routing on select Chevrolet, GMC, Buick, Oldsmobile, and Pontiac applications. Made from EPDM, it is shaped to match the factory hose path and dimensions for a direct replacement on listed vehicles.

Gates Molded Coolant Hose line is engineered for upper, lower, bypass, heater, and other coolant applications with OEM-quality specifications, giving you a replacement option that follows the original hose form without needing to source the part from an OE dealer.

Key Features

• EPDM construction for coolant-system service
• Molded shape for factory-style routing
• Lower radiator hose application on listed vehicles
• End 1 inside diameter: 1.5 in. (38 mm)
• End 2 inside diameter: 1.75 in. (44 mm)
• Centerline length: 16.5 in. (419 mm)
• No spring and no quick-connect fittings

Detailed Product Description

Gates 20931 is a molded radiator coolant hose designed around OEM-quality specifications for vehicles that require a lower hose with a formed bend and specific end diameters. The EPDM material is commonly used in cooling-system service because it is suited to coolant exposure and underhood temperatures. This hose is a practical replacement for drivers servicing a Chevrolet S10 lower radiator hose, GMC Sonoma lower coolant hose, or similar applications listed in the fitment data.

This part cross-references Continental 60903 and Dayco 70530 for the same application. The Gates 20931 part number is also referenced in interchange listings for related replacement searches.

Vehicle Fitment

• Fits 1991-1994 Oldsmobile Bravada, lower; optional hose; molded coolant hose
• Fits 1991-1993 GMC Sonoma, lower; optional hose; molded coolant hose
• Fits 1988-1992 Chevrolet S10, lower; optional hose; molded coolant hose
• Fits 1988-1992 Chevrolet S10 Blazer, lower; optional hose; molded coolant hose
• Fits 1992 GMC Jimmy, lower; optional hose; molded coolant hose
• Fits 1988-1991 GMC S15 Jimmy, lower; optional hose; molded coolant hose
• Fits 1988-1990 GMC S15, lower; optional hose; molded coolant hose
• Fits 1977-1979 Buick Skylark, lower; molded coolant hose
• Fits 1976-1979 Chevrolet Nova, lower; molded coolant hose
• Fits 1977-1979 Oldsmobile Omega, lower; molded coolant hose
• Fits 1977-1979 Pontiac Phoenix, lower; molded coolant hose
• Fits 1972 Chevrolet Nova, lower; optional hose; cut to fit; molded coolant hose

Common Problems This Hose Can Address

• Cracked or split lower radiator hose
• Coolant leaks at the hose body or bends
• Softening, swelling, or collapse of an aging hose
• Incorrect hose shape from a universal replacement
• Fitment issues when replacing a factory-formed coolant hose

Installation Notes and Tips

Verify the hose routing, end diameters, and centerline length against the removed part before installation. Because this is a molded hose, align it to the factory path so the bends are not twisted during clamp tightening. Inspect adjoining necks, clamps, and coolant condition before returning the vehicle to service.

Quality Assurance

Gates manufactures this molded coolant hose to OEM-quality specifications for the listed applications. The molded construction and EPDM material support accurate fitment and dependable cooling-system replacement service.