Gates 51748 HVAC Heater Hose - Heater To Thermostat

Gates Molded Coolant Hose 51748 for Rear-Heater Applications

The Gates 51748 molded coolant hose is built for specific HVAC heater-to-thermostat routing on select GM trucks and SUVs with rear heater systems. It follows OEM-style routing and integrates application-specific components to match the original hose layout.

Key Features

• EPDM and plastic construction for coolant system service
• Molded shape for heater-to-thermostat routing
• Application-specific design with a branch and female quick connector
• Centerline length: 23.5 in. (597 mm)
• End sizes include 1 in. (25 mm) and .595 in. (15 mm) connections
• Direct replacement style for select Cadillac, Chevrolet, and GMC models

Product Details

Gates Molded Coolant Hose 51748 is part of the Gates molded coolant hose line, which is built for specific vehicle applications and mirrors OEM-style hose layouts with integrated features such as branches and quick-connect connections where required. This hose is used in heater-to-thermostat routing on vehicles including the Cadillac Escalade, Chevrolet Tahoe, Chevrolet Suburban, and GMC Yukon. It is a practical replacement for aging or damaged HVAC heater hose assemblies that need the correct molded shape and connection points.

This part cross-references Dorman OE Solutions 626-538 for the same application.

What It Helps Fix

• Coolant leaks from cracked or deteriorated heater hose material
• Improper hose routing caused by a damaged molded hose
• Loss of rear heater performance from restricted coolant flow
• Connection issues at the female quick connector or branch point
• Fitment problems when replacing a non-molded hose with the correct OE-style layout

Installation Notes and Tips

Verify the vehicle’s heater-to-thermostat routing before installation and match the hose ends, branch configuration, and quick-connector style to the original part. This hose is listed for select 2001-2014 Cadillac Escalade, Cadillac Escalade ESV, Cadillac Escalade EXT, Chevrolet Suburban 1500, Chevrolet Suburban 2500, Chevrolet Tahoe, Chevrolet Silverado 1500, GMC Yukon, GMC Yukon XL 1500, and GMC Yukon XL 2500 applications with rear heater configurations where noted. Always inspect adjoining coolant components, clamps, and connectors for wear before reassembly.

Quality Assurance

Gates manufactures this molded coolant hose as an OE-style replacement for specific applications, using materials and integrated features intended to match the original hose design requirements. Part number 51748 is built for accurate fitment on the listed vehicles and HVAC routing.