Gates 91051-20 HVAC Heater Hose Connector - Coolant Elbow - Lower

Gates Aluminum Heater Hose Connector

The Gates 91051-20 is an aluminum HVAC heater hose connector built as an elbow-style coolant fitting for lower coolant elbow applications. It is used to route coolant between hose sections in the cooling system on select Buick, Chevrolet, Pontiac, and Oldsmobile vehicles.

Gates Hose Connectors (Aluminum) are part of a product line focused on aluminum cooling system connectors for service replacement use. This connector follows the specified hose diameters and elbow configuration for a direct-fit style repair on supported applications.

Key Features

• Aluminum elbow connector for HVAC heater hose and cooling system routing
• End 1 outside diameter: 0.875 in. (22 mm)
• End 2 outside diameter: 1.000 in. (25 mm)
• Lower coolant elbow position for select GM applications
• Gates part number 91051-20 for identification and ordering
• Cross-reference: 12565082 for the same application

Detailed Description

The Gates 91051-20 aluminum HVAC heater hose connector is engineered for lower coolant elbow service where a formed elbow fitting is needed to carry coolant through the cooling circuit. Its aluminum construction and elbow connector design make it a practical replacement for worn, corroded, or leaking hose connection points. This part number 91051-20 is listed for multiple GM platforms, including Buick LeSabre, Buick Park Avenue, Chevrolet Impala, and Pontiac Grand Prix applications.

Compatible vehicle coverage includes Fits 2005-2009 Buick Allure, Coolant Elbow - Lower; Fits 2005-2009 Buick LaCrosse, Coolant Elbow - Lower; Fits 2006-2008 Buick Lucerne, Coolant Elbow - Lower; Fits 1999-2008 Pontiac Grand Prix, Coolant Elbow - Lower; and additional Buick, Chevrolet, Pontiac, and Oldsmobile models listed below.

What It Helps Fix

• Coolant leaks at a damaged lower elbow connector
• Cracked or corroded heater hose connection points
• Improper hose routing in the lower coolant circuit
• Restricted coolant flow caused by a failing elbow fitting
• Service replacement needs on GM cooling system hose connections

Installation Notes

• Verify hose outside diameters before installation: 0.875 in. (22 mm) and 1.000 in. (25 mm)
• Confirm the lower coolant elbow position matches the vehicle application
• Inspect adjoining hoses and clamps for wear before reassembly
• Match the connector to the vehicle’s cooling system layout before service

Quality Assurance

Gates is a recognized name in automotive hose and cooling system components, and the 91051-20 is built as an aluminum replacement connector for specified GM applications. This part cross-references 12565082 for the same application.