Dorman 56359 HVAC Heater Hose Fitting

Dorman HVAC Heater Hose Fitting for OE-Style Repair

Dorman 56359 is a specific-fit HVAC heater hose fitting for vehicles that use a quick disconnect heater hose connection. It is built with a plastic body and a straight layout to match the stock-style connection point and maintain leak-free heater hose service.

Compatible With 1990-1995 Buick Regal, 1991-1995 Buick Park Avenue, and 1992-1995 Pontiac Bonneville applications that use the listed heater hose connection style. Dorman 56359 also cross-references 563593 and 24500534 for the same application.

Key Features

• HVAC heater hose fitting for specific vehicle applications
• Plastic construction for stock-style replacement use
• Straight fitting design
• Quick disconnect ends on both sides
• Quick connect system included in the design
• Engineered to match OE fit and durability requirements
• Built to handle extreme temperature exposure for heater circuit service

Detailed Description

This heater hose fitting is used in the HVAC heater hose circuit where a quick disconnect connection is required. The straight configuration and specific-fit design help it align with the original hose routing on supported Buick, Chevrolet, Oldsmobile, and Pontiac vehicles, including Buick LeSabre, Buick Regal, Oldsmobile 98, and Pontiac Trans Sport applications. Dorman 56359 is a practical replacement when the original heater hose fitting is cracked, leaking, or no longer sealing correctly.

The part number 56359 is commonly searched for OE-style heater hose repair on 1990-1995 Buick Regal and related GM platforms. Its quick disconnect ends and plastic construction make it a direct replacement choice for restoring heater hose connection integrity without changing the original system layout.

Common Problems This Part Can Address

• Coolant seepage at the heater hose connection
• Cracked or brittle plastic fitting body
• Loose quick disconnect engagement
• Loss of heater performance from a leaking hose joint
• Damaged OE heater hose fitting on GM HVAC systems

Installation Notes and Tips

Verify the original connection style, hose size, and vehicle application before installation. This fitting uses quick disconnect ends and a straight layout, so the existing heater hose routing should match the OE configuration. Inspect the mating hose ends and seals for wear before assembly to help maintain a secure connection.

Quality Assurance

Dorman designs this replacement HVAC heater hose fitting to match the fit and durability of the stock part on specified vehicles. It is engineered for temperature resistance and leak-free service in the heater hose circuit.