Dayco 71973 Radiator Coolant Hose - Upper

Dayco 71973 Curved Radiator Hose Overview

Dayco 71973 is a curved radiator coolant hose for upper cooling-system routing on select Chevrolet and GMC trucks and SUVs. Built from EPDM rubber and formed as a dual I.D. hose, it provides the correct transition between 1 1/4-inch and 1 1/2-inch connections for the listed applications.

For buyers searching for a Dayco curved radiator hose 71973 for 1989-1991 Chevrolet Blazer or GMC Jimmy upper hose replacement, this part matches the specified OE-style fitment and SAE cooling-hose standards.

Key Features

• EPDM construction for coolant-system service
• Black finish for a clean OE-style appearance
• Dual I.D. hose with 1 1/4-inch end and 1 1/2-inch end
• Curved radiator hose profile for upper hose routing
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• No heat shield and no protective sleeve

Product Details

Dayco Curved Radiator Hose 71973 is a radiator coolant hose engineered for upper hose applications where the hose must follow a curved path between different diameter connections. The EPDM rubber construction is suited for coolant exposure and underhood temperature cycling, while the dual inside diameter design supports the listed OE-style fitment on 1989-1991 Chevrolet Blazer, Chevrolet R1500 Suburban, Chevrolet R2500 Suburban, Chevrolet V1500 Suburban, Chevrolet V2500 Suburban, GMC Jimmy, GMC R1500 Suburban, GMC R2500 Suburban, GMC V1500 Suburban, and GMC V2500 Suburban.

This part cross-references Gates 22187 for the same application.

Vehicle Fitment

• Fits 1989-1991 Chevrolet Blazer, Upper
• Fits 1989-1991 Chevrolet R1500 Suburban, Upper
• Fits 1989-1991 Chevrolet R2500 Suburban, Upper
• Fits 1989-1991 Chevrolet V1500 Suburban, Upper
• Fits 1989-1991 Chevrolet V2500 Suburban, Upper
• Fits 1989-1991 GMC Jimmy, Upper
• Fits 1989-1991 GMC R1500 Suburban, Upper
• Fits 1989-1991 GMC R2500 Suburban, Upper
• Fits 1989-1991 GMC V1500 Suburban, Upper
• Fits 1989-1991 GMC V2500 Suburban, Upper

Installation Notes and Tips

• Verify the upper hose routing and end diameters before installation.
• Inspect hose necks, clamps, and adjacent cooling components for wear or corrosion.
• Drain coolant as needed before removing the existing hose.
• Align the hose without twisting so the curved shape follows the factory path.
• After installation, refill the cooling system and check for leaks at operating temperature.

Quality Assurance

Dayco manufactures this hose to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications for cooling-system service. The part number 71973 is also listed under common aftermarket and OE cross-references, including ACDelco 26295X, Duralast E71973, General Motors 15565359, and NAPA 8847.