Gates 19025 HVAC Heater Hose

Gates 19025 Molded Heater Hose Overview

The Gates 19025 molded heater hose is a factory-shaped coolant hose built for tight engine bays and OE-style routing. Made from EPDM, it is sized for small I.D. heater and coolant connections and is also approved for marine applications.

Compatible With a wide range of vehicles, including Chevrolet Silverado 1500, Toyota Tacoma, and GMC Sierra 1500 applications, this molded hose supports heater, coolant, water, and air routing where a formed hose is required. The Gates Molded Heater Hose line focuses on direct-fit shapes for modern compact engine compartments.

Key Features

• Gates part number 19025
• Factory-molded, OE-style hose shape
• EPDM construction for coolant and heater service
• Small I.D. design with 15 mm / .59 in. ends
• 7.1 in. centerline length for formed routing
• Approved for coolant, water, air, and marine use
• Fits applications across 1996-2017 model years

Product Details

This molded heater hose is built for vehicles that need a precise formed hose rather than a universal straight section. The 19025 uses EPDM material and a molded profile to follow factory routing in tighter spaces, helping maintain proper hose alignment in HVAC and cooling circuits. It is listed across many GM, Toyota, Ford, Chrysler, Mazda, Lexus, Saturn, Pontiac, Oldsmobile, Cadillac, Dodge, Plymouth, and Isuzu applications.

This part cross-references Dayco 71877 for the same application. The Gates Molded Heater Hose product line is aimed at replacement service where OE-style shape and fit are important for heater and coolant hose routing.

Common Problems It Can Address

• Cracked or leaking molded heater hose sections
• Improper hose routing in tight engine compartments
• Coolant loss at formed hose connections
• Heat-related hose deterioration in HVAC and cooling circuits
• Replacement needs for OE-shaped heater hose runs

Installation Notes and Tips

Verify end inside diameter, centerline length, and routing position before installation. Confirm the vehicle-specific location such as Tee-2 to Thermostat, Heater to Connector, Pipe-1 to Pipe-2, or Splice to Pipe against the original hose. For best results, compare the old hose shape to the new molded profile before final fitment on Chevrolet Silverado 1500, Toyota Tacoma, or GMC Sierra 1500 applications.

Quality Assurance

Gates manufactures this molded heater hose as an OE-style replacement built from EPDM and shaped for factory routing. The design is intended to meet the demands of coolant, water, air, and marine service in applications that require a formed hose.