Gates 51747 HVAC Heater Hose - Heater To Thermostat

Gates 51747 Molded Coolant Hose Overview

The Gates 51747 molded coolant hose is a direct-fit HVAC heater hose for select GM trucks and SUVs with heater-to-thermostat routing. Built from EPDM and plastic, it follows the original hose shape and integrates OE-style features for a cleaner, application-specific replacement.

Compatible With Cadillac Escalade, Chevrolet Silverado, Tahoe, GMC Yukon, and related models, this molded coolant hose supports the heater circuit on vehicles listed below.

Key Features

• Gates Molded Coolant Hose line for application-specific fitment
• EPDM and plastic construction for coolant system service
• Heater to thermostat routing
• OE-style molded shape for the listed vehicles
• Integrated branch and female quick connector details where required by application
• Part number 51747 for easy identification

Product Details

Gates 51747 is engineered for vehicles that use a molded heater hose assembly between the heater circuit and thermostat housing. Gates builds this hose to match specific applications and to reflect OEM-style construction, including integrated components such as branches and quick-connect features when required. This helps maintain the original routing and connection style on the cooling system side of the HVAC circuit.

This part cross-references Dorman OE Solutions 626-111 and 626-619 for the same application. The 51747 part number is also useful when searching for a replacement molded coolant hose for Cadillac Escalade, Chevrolet Silverado, and GMC Yukon platforms.

What This Hose Helps Address

• Coolant leaks from a cracked or aged heater hose
• Softening, swelling, or collapse in the hose body
• Damaged quick-connect or branch-style hose sections
• Loss of heater performance caused by restricted coolant flow
• Improper routing after a previous hose failure

Installation Notes and Fitment

Verify the vehicle’s heater hose routing before ordering, especially on models with or without rear heater or rear A/C equipment. Fits 2002-2014 Cadillac Escalade, heater to thermostat; fits 2003-2014 Cadillac Escalade ESV, heater to thermostat; fits 2002-2013 Cadillac Escalade EXT, heater to thermostat; fits 2001-2014 Chevrolet Tahoe, heater to thermostat; fits 2002-2014 GMC Yukon, heater to thermostat; fits 2001-2014 GMC Yukon XL 1500, heater to thermostat.

Additional fitment includes 2001-2014 Chevrolet Silverado 1500, 2001-2009 Chevrolet Silverado 2500 HD, 2001-2006 Chevrolet Silverado 3500, 2001-2013 GMC Sierra 1500, 2001-2008 GMC Sierra 2500 HD, and 2001-2008 GMC Sierra 3500 HD, all in heater to thermostat applications as listed. Confirm connector style and hose routing against the removed part before installation.

Quality Assurance

Gates is a recognized automotive aftermarket supplier focused on modular coolant hose assemblies that mirror OE-style application requirements. The 51747 molded coolant hose is built to match the listed vehicle configurations and integrated connection points used in those cooling system layouts.