Gates 18569 HVAC Heater Hose - Engine To Heater

Gates Molded Heater Hose 18569 Overview

The Gates 18569 molded heater hose is an OEM-style coolant hose built for tight engine bays where a straight hose will not route correctly. It is formed to match factory-style bends and is suitable for coolant, water, and air service, with marine application approval.

Compatible with 2000-2005 Buick LeSabre engine to heater, 2002-2005 Buick Park Avenue engine to heater, and 2002-2005 Pontiac Bonneville engine to heater, this molded heater hose supports direct-fit replacement needs for common GM heater circuit routing. The Gates Molded Heater Hose line focuses on factory-shaped hoses for smaller, tighter-fitting engine compartments.

Key Features

• Gates part number 18569 molded heater hose
• Factory-molded, OE-style shape for accurate routing
• EPDM construction for coolant-system service
• End I.D. 0.61 in. / 15 mm at both ends
• Centerline length: 25.4 in. / 645 mm
• Approved for coolant, water, air, and marine applications
• Designed for engine-to-heater routing in compact engine compartments

Product Details

This molded heater hose is built to replace a formed coolant hose in the engine-to-heater circuit. The EPDM material is commonly used in cooling-system hose applications, and the molded profile helps maintain the correct path around nearby components in crowded engine bays. If you are replacing a worn or leaking heater hose on a Buick LeSabre, Buick Park Avenue, or Pontiac Bonneville, Gates 18569 provides the correct molded layout for the listed applications.

This part cross-references CSF 10569 for the same application.

Common Problems This Hose Can Address

• Coolant leaks from a cracked or aged heater hose
• Improper hose routing after a previous repair
• Softening, swelling, or deterioration of the original EPDM hose
• Restricted heater flow caused by a damaged hose section
• Fitment issues in tight engine compartments where a straight hose will not follow the factory path

Installation Notes and Tips

Verify hose routing against the original part before installation, especially on engine-to-heater applications where bends and length are critical. Inspect adjoining heater pipes, clamps, and connection points for corrosion or wear before installing the new hose. Confirm the 0.61-inch end diameters and 25.4-inch centerline length match the vehicle’s factory routing requirements.

Quality Assurance

Gates is known for OE-style hose construction and application-specific molded designs. Part number 18569 is built to match factory routing needs for the listed Buick and Pontiac applications.