Gates HHA147 HVAC Heater Hose Assembly

Gates HHA147 Heater Hose Assembly

The Gates HHA147 heater hose assembly is an OE-exact replacement built with OE-grade materials for a precise fit and dependable cooling system service. This coolant air bleed crossover pipe includes a protective sleeve and is made for select Buick, Cadillac, Chevrolet, GMC, Hummer, and Isuzu applications.

Key Features

• OE Exact fitment for direct replacement service
• Steel construction for the coolant air bleed crossover pipe
• Protective sleeve included on the pipe assembly
• Molded design for application-specific routing
• Matches the original-style heater hose assembly layout
• Cross-reference: Dorman OE Solutions 626-591

Product Details

Gates Heater Hose Assemblies are engineered to match original equipment dimensions and connection points, helping restore proper coolant routing in demanding HVAC and engine cooling repairs. The HHA147 is a steel coolant air bleed crossover pipe with OE-exact comparison rating, 12.5-inch centerline length, and application coverage for vehicles such as Chevrolet Express, Silverado, Suburban, Tahoe, GMC Sierra, Yukon, Cadillac Escalade, and Hummer H3. If you are replacing a worn or leaking crossover pipe on a Chevrolet Silverado 2500 HD or GMC Sierra 3500 HD, this Gates HHA147 part number provides a direct-fit service solution.

Common Repair Uses

• Coolant seepage at the crossover pipe
• Corrosion or damage to the heater hose assembly
• Air trapped in the cooling system after service
• Improper coolant flow through the bleed crossover pipe
• Fitment issues caused by a bent or deteriorated OE pipe

Installation Notes

Verify vehicle application before installation and compare the original routing, length, and connection style to the new assembly. This part is listed for N/A position applications and is intended for vehicles including Chevrolet Express 2500, GMC Savana 3500, and Chevrolet Silverado 1500. For best results, inspect adjacent hoses, clamps, and coolant condition during replacement. The Gates HHA147 is also referenced for Chevrolet Silverado, GMC Sierra, and Cadillac Escalade cooling system service.

Quality Assurance

Gates builds this heater hose assembly with OE-grade materials and OE-exact fit standards to support accurate replacement on the listed applications. Part number HHA147 is engineered for direct-fit service on the specified Buick, Cadillac, Chevrolet, GMC, Hummer, and Isuzu vehicles.