Gates 20489 Radiator Coolant Hose - Lower
OE Quality 60-Day Returns
Gates
 Molded Coolant Hose

Gates 20489 Radiator Coolant Hose - Lower

Brand Gates 20489
Position Lower
0
Yes
Branch Quantity 0
Centerline Length 17.8
Centerline Length 452
Contains Spring No
End 1 Inside Diameter 1.75
End 1 Inside Diameter 44
End 2 Inside Diameter 1.75
End 2 Inside Diameter 44
Material EPDM
Modular Hose No
Molded Yes
Number of Quick Connect Fittings 0
Product line Molded Coolant Hose
Fits Chevrolet, GMC, and Cadillac · 63 vehicles

OEM-quality specifications. Built as a molded coolant hose for dependable replacement fit.

EPDM construction. Resists heat and coolant exposure for long service life.

Molded design. Follows the hose path for a clean, factory-style routing.

Cross-references Champion Spark Plug 354, Continental 60371 and Dayco 70354 for the same application. See all 34.

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Not what you need? See all Radiator Coolant Hose options

Gates 20489 Molded Coolant Hose Overview

The Gates Molded Coolant Hose 20489 is a molded EPDM radiator coolant hose built to OE-style dimensions for lower cooling system routing. With a 1.75 in. inside diameter at both ends and a 17.8 in. centerline length, it supports direct replacement needs on select Chevrolet, GMC, and Cadillac applications.

Compatible with lower hose applications on 1963-1972 Chevrolet Blazer, C10 Suburban, C20 Suburban, K10 Suburban, K20 Suburban, 1970-1972 GMC Jimmy, 1971 GMC G15/G1500 Van, G25/G2500 Van, G35/G3500 Van, and select Cadillac models, this Gates 20489 hose follows the molded shape needed for proper routing.

Key Features

  • EPDM construction for coolant-system service
  • Molded hose profile for OE-style routing
  • 1.75 in. inside diameter at both ends
  • 17.8 in. centerline length
  • Lower radiator coolant hose application
  • No spring and no quick-connect fittings

Product Details

Gates Molded Coolant Hose line covers upper, lower, bypass, heater, and other coolant applications with OEM-quality specifications. The 20489 part number is part of that molded hose range and is built for direct-fit replacement where a formed lower hose is required. This hose is a practical choice for restoring coolant flow on classic Chevrolet Blazer and Suburban models, as well as GMC Jimmy and van applications and select Cadillac chassis and passenger cars.

This part cross-references Dayco 70354 and Continental 60371 for the same application.

Common Cooling System Issues It Can Address

  • Cracked or split lower radiator hose
  • Collapsed hose routing from age or heat exposure
  • Coolant leaks at the hose body
  • Poor fitment from a straight universal hose
  • Restricted coolant flow caused by deteriorated rubber

Installation Notes and Tips

Verify hose routing, end diameters, and centerline length against the removed part before installation. Inspect hose clamps, radiator necks, and water pump connections for wear or corrosion, and replace damaged sealing surfaces before filling the cooling system. After installation, refill with the correct coolant mixture and check for leaks at operating temperature.

Quality Assurance

Gates manufactures molded coolant hoses to OE-quality specifications, and the 20489 is built to match the shape and dimensions needed for listed lower hose applications. Gates’ molded coolant hose program is a broad replacement line for radiator hose service.

Related reading

This part fits 63 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelTransmissionLitersCylindersFuel TypePositionNotes
1972ChevroletBlazer—4.1LL6GASLowerMolded Coolant Hose
1972ChevroletC10 Suburban—4.1LL6GASLowerMolded Coolant Hose
1972ChevroletC10 Suburban—4.8LL6GASLowerMolded Coolant Hose
1972ChevroletC20 Suburban—4.1LL6GASLowerMolded Coolant Hose
1972ChevroletC20 Suburban—4.8LL6GASLowerMolded Coolant Hose
1972ChevroletK10 Suburban—4.1LL6GASLowerMolded Coolant Hose
1972ChevroletK20 Suburban—4.1LL6GASLowerMolded Coolant Hose
1972ChevroletK20 Suburban—4.8LL6GASLowerMolded Coolant Hose
1972GMCJimmy—4.1LL6GASLowerMolded Coolant Hose
1971ChevroletBlazer—4.1LL6GASLowerMolded Coolant Hose
1971ChevroletC10 Suburban—4.1LL6GASLowerMolded Coolant Hose
1971ChevroletC10 Suburban—4.8LL6GASLowerMolded Coolant Hose
1971ChevroletC20 Suburban—4.1LL6GASLowerMolded Coolant Hose
1971ChevroletC20 Suburban—4.8LL6GASLowerMolded Coolant Hose
1971ChevroletK10 Suburban—4.1LL6GASLowerMolded Coolant Hose
1971ChevroletK20 Suburban—4.1LL6GASLowerMolded Coolant Hose
1971ChevroletK20 Suburban—4.8LL6GASLowerMolded Coolant Hose
1971GMCG15/G1500 VanManual4.1LL6GASLowerMolded Coolant Hose
1971GMCG25/G2500 VanManual4.1LL6GASLowerMolded Coolant Hose
1971GMCG35/G3500 VanManual4.1LL6GASLowerMolded Coolant Hose
1971GMCJimmy—4.1LL6GASLowerMolded Coolant Hose
1970ChevroletBlazer—4.1LL6GASLowerMolded Coolant Hose
1970ChevroletC10 Suburban—4.1LL6GASLowerMolded Coolant Hose
1970ChevroletC10 Suburban—4.8LL6GASLowerMolded Coolant Hose
1970ChevroletC20 Suburban—4.1LL6GASLowerMolded Coolant Hose
1970ChevroletC20 Suburban—4.8LL6GASLowerMolded Coolant Hose
1970ChevroletK10 Suburban—4.1LL6GASLowerMolded Coolant Hose
1970ChevroletK10 Suburban—4.8LL6GASLowerMolded Coolant Hose
1970ChevroletK20 Suburban—4.1LL6GASLowerMolded Coolant Hose
1970ChevroletK20 Suburban—4.8LL6GASLowerMolded Coolant Hose
1970GMCJimmy—4.1LL6GASLowerMolded Coolant Hose
1969ChevroletBlazer—4.1LL6GASLowerMolded Coolant Hose
1969ChevroletC10 Suburban—4.1LL6GASLowerMolded Coolant Hose
1969ChevroletC10 Suburban—4.8LL6GASLowerMolded Coolant Hose
1969ChevroletC20 Suburban—4.1LL6GASLowerMolded Coolant Hose
1969ChevroletC20 Suburban—4.8LL6GASLowerMolded Coolant Hose
1969ChevroletK10 Suburban—4.1LL6GASLowerMolded Coolant Hose
1969ChevroletK10 Suburban—4.8LL6GASLowerMolded Coolant Hose
1969ChevroletK20 Suburban—4.1LL6GASLowerMolded Coolant Hose
1969ChevroletK20 Suburban—4.8LL6GASLowerMolded Coolant Hose
1968ChevroletC10 Suburban—4.1LL6GASLowerMolded Coolant Hose
1968ChevroletC10 Suburban—4.8LL6GASLowerMolded Coolant Hose
1968ChevroletC20 Suburban—4.1LL6GASLowerMolded Coolant Hose
1968ChevroletC20 Suburban—4.8LL6GASLowerMolded Coolant Hose
1968ChevroletK10 Suburban—4.1LL6GASLowerMolded Coolant Hose
1968ChevroletK20 Suburban—4.1LL6GASLowerMolded Coolant Hose
1968ChevroletK20 Suburban—4.8LL6GASLowerMolded Coolant Hose
1967ChevroletC10 Suburban—4.1LL6GASLowerMolded Coolant Hose
1967ChevroletC10 Suburban—4.8LL6GASLowerMolded Coolant Hose
1967ChevroletC20 Suburban—4.1LL6GASLowerMolded Coolant Hose
1967ChevroletC20 Suburban—4.8LL6GASLowerMolded Coolant Hose
1967ChevroletK10 Suburban—4.1LL6GASLowerMolded Coolant Hose
1967ChevroletK10 Suburban—4.8LL6GASLowerMolded Coolant Hose
1967ChevroletK20 Suburban—4.1LL6GASLowerMolded Coolant Hose
1967ChevroletK20 Suburban—4.8LL6GASLowerMolded Coolant Hose
1965CadillacCommercial Chassis—7.0LV8GASLowerMolded Coolant Hose
1965CadillacFleetwood—7.0LV8GASLowerMolded Coolant Hose
1964CadillacCommercial Chassis—7.0LV8GASLowerMolded Coolant Hose
1964CadillacDeVille—7.0LV8GASLowerMolded Coolant Hose
1964CadillacEldorado—7.0LV8GASLowerMolded Coolant Hose
1963CadillacCommercial Chassis—6.4LV8GASLowerMolded Coolant Hose
1963CadillacDeVille—6.4LV8GASLowerMolded Coolant Hose
1963CadillacEldorado—6.4LV8GASLowerMolded Coolant Hose
Directly replaces or cross-references 34 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Champion Spark Plug — 354Continental — 60371Dayco — 70354Dayco — 70623Four Seasons — 623Gates — 20489Gates — 70665NGK — 7293TC Remanufacturing — MC1214-1689-4091201322022M604327033114783943897878389854538985473908413395758239575833765013682BH-872BH-913C0489C70354C70623KM-5MC119MH370MR639MR695RH134