Gates 18129 HVAC Heater Hose - Radiator To Throttle Body or Reservoir To Pipe

Gates Molded Heater Hose 18129 Overview

Gates 18129 is a molded HVAC heater hose built for tight engine bays where a straight hose will not route cleanly. This OEM-style coolant hose is formed to match factory routing and is suitable for coolant, water, and air service, with marine application approval.

Built from EPDM, this Gates Molded Heater Hose line is made for dependable routing in compact systems. It is a practical choice for owners servicing a 2003-2007 Chevrolet Express 1500, 2003-2007 GMC Savana 2500, or 2007-2009 Saturn Vue that needs a formed heater or coolant hose with the correct centerline shape.

Key Features

• Gates molded heater hose, part number 18129
• Factory-molded, OEM-style shape for tight engine compartments
• EPDM construction for coolant, water, and air applications
• Small inside diameters: 6 mm (.25 in) and 8 mm (.31 in)
• Centerline length: 836 mm (32.9 in)
• Molded design for routed HVAC and coolant connections
• Approved for marine applications

Detailed Description

Gates 18129 is part of the Molded Heater Hose product line, which focuses on formed hoses that follow original equipment routing in modern vehicles with limited clearance. The molded profile helps match the factory path between components, reducing the need to force a universal hose into a space it was not shaped for. This part number is listed for applications such as the Chevrolet Express 2500, GMC Savana 3500, and Saturn Vue, where the hose route is critical to proper fitment.

This hose is built from EPDM and measures 836 mm in centerline length, with end diameters of 6 mm and 8 mm. Gates 18129 cross-references Anchor 10129 for the same application.

Common Repair Uses

• Replacing a cracked or hardened molded heater hose
• Restoring coolant flow in a routed HVAC hose path
• Fixing leaks at a formed hose connection
• Correcting fitment issues caused by a straight universal hose
• Servicing coolant, water, or air transfer lines in compact engine bays

Installation Notes

Verify hose routing, end diameters, and centerline length before installation. Match the molded shape to the original hose path on the vehicle and inspect adjoining pipes, clamps, and fittings for wear or corrosion. Confirm application details for the specific Chevrolet Express, GMC Savana, or Saturn Vue configuration before replacement.

Quality Assurance

Gates is known for OE-style hose construction and application-specific molded routing. Part number 18129 is built to factory-style dimensions for direct replacement use in listed HVAC and coolant hose applications.