Gates 21709 Radiator Coolant Hose - Upper
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Gates
 Molded Coolant Hose

Gates 21709 Radiator Coolant Hose - Upper

Brand Gates 21709
Position Upper
0
Yes
Branch Quantity 0
Centerline Length 33.4
Centerline Length 848
Contains Spring No
End 1 Inside Diameter 1.15
End 1 Inside Diameter 29
End 2 Inside Diameter 1.25
End 2 Inside Diameter 32
Material EPDM, Plastic
Modular Hose No
Molded Yes
Number of Quick Connect Fittings 0
Product line Molded Coolant Hose
Fits Cadillac · 14 vehicles

OEM-quality specifications. Molded coolant hose built to match replacement needs.

Molded design. Formed for a precise coolant routing fit.

EPDM, plastic construction. Combines durability with reliable coolant resistance.

Cross-references Anchor 8399, Dayco 71377 and FEL-PRO 61550 for the same application. See all 17.

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Gates 21709 Molded Coolant Hose

The Gates 21709 molded coolant hose is built for upper radiator hose applications with OEM-quality specifications. It is formed from EPDM and plastic for a precise fit on select Cadillac cooling systems, including DeVille, Fleetwood, and Commercial Chassis models.

Key Features

  • Molded coolant hose for upper radiator hose routing
  • EPDM and plastic construction
  • End inside diameters: 29 mm (1.15 in) and 32 mm (1.25 in)
  • Centerline length: 848 mm (33.4 in)
  • No spring and no quick-connect fittings
  • Direct replacement style for select Cadillac cooling system service

Product Details

Gates Molded Coolant Hose line is engineered for upper, lower, bypass, heater, and other coolant applications, with fitment built around OEM-style specifications. The Gates 21709 is a molded radiator coolant hose for select 1988-1992 Cadillac DeVille, 1988-1992 Cadillac Fleetwood, and 1988-1991 Cadillac Commercial Chassis upper hose applications. This part cross-references Dayco 71377 for the same application.

Common Cooling System Issues

  • Cracked or hardened upper radiator hose
  • Coolant leaks at the hose body or ends
  • Restricted coolant flow from a deteriorated hose
  • Service replacement for aging Cadillac DeVille, Fleetwood, or Commercial Chassis cooling systems
  • Incorrect hose shape or length after prior repairs

Installation Notes

Verify the hose routing, end diameters, and centerline length before installation. Confirm upper hose placement and inspect adjoining clamps, necks, and coolant passages for wear or contamination. Match the molded shape to the original routing on the vehicle for proper clearance and sealing.

Quality Assurance

Gates manufactures this molded coolant hose to OEM-quality specifications for replacement service. The Gates 21709 is part of Gates’ molded coolant hose line, which covers a broad range of cooling system applications.

Fitment

  • Fits 1991-1992 Cadillac DeVille, Upper; Optional Hose; Molded Coolant Hose
  • Fits 1991-1992 Cadillac Fleetwood, Upper; Optional Hose; Molded Coolant Hose
  • Fits 1991 Cadillac Commercial Chassis, Upper; Optional Hose; Molded Coolant Hose
  • Fits 1988-1990 Cadillac Commercial Chassis, Upper; Molded Coolant Hose
  • Fits 1988-1990 Cadillac DeVille, Upper; Molded Coolant Hose
  • Fits 1988-1990 Cadillac Fleetwood, Upper; Molded Coolant Hose

Related reading

This part fits 14 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersFuel TypePositionNotes
1992CadillacDeVille4.9LV8GASUpperOptional Hose; Molded Coolant Hose
1992CadillacFleetwood4.9LV8GASUpperOptional Hose; Molded Coolant Hose
1991CadillacCommercial Chassis4.9LV8GASUpperOptional Hose; Molded Coolant Hose
1991CadillacDeVille4.9LV8GASUpperOptional Hose; Molded Coolant Hose
1991CadillacFleetwood4.9LV8GASUpperOptional Hose; Molded Coolant Hose
1990CadillacCommercial Chassis4.5LV8GASUpperMolded Coolant Hose
1990CadillacDeVille4.5LV8GASUpperMolded Coolant Hose
1990CadillacFleetwood4.5LV8GASUpperMolded Coolant Hose
1989CadillacCommercial Chassis4.5LV8GASUpperMolded Coolant Hose
1989CadillacDeVille4.5LV8GASUpperMolded Coolant Hose
1989CadillacFleetwood4.5LV8GASUpperMolded Coolant Hose
1988CadillacCommercial Chassis4.5LV8GASUpperMolded Coolant Hose
1988CadillacDeVille4.5LV8GASUpperMolded Coolant Hose
1988CadillacFleetwood4.5LV8GASUpperMolded Coolant Hose
Directly replaces or cross-references 17 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Anchor — 8399Dayco — 71377FEL-PRO — 61550Gates — 21709MOOG Driveline Products — 487SKF — 4155014-2515-626154X22530624255306232553062425534668C1709E71377KM-2277MC188MH-4709