Four Seasons 55450 A/C Refrigerant Discharge / Suction Hose Assembly

Four Seasons 55450 A/C Hose Assembly

Four Seasons 55450 is an OE replacement A/C refrigerant discharge and suction hose assembly for R134a systems. Built with aluminum and rubber construction, it is made for vehicles that need a direct-style HVAC hose replacement with the correct manifold, muffler, and seal provisions.

This hose assembly is listed for 1987-1991 Pontiac 6000, 1987-1989 Buick Century, 1987-1989 Chevrolet Celebrity, and 1987-1989 Oldsmobile Cutlass Ciera and Cutlass Cruiser. It is a practical choice when servicing an aging GM HVAC system that uses the original hose routing and connection style.

Key Features

• Part number 55450 from Four Seasons Hose Assembly line
• A/C refrigerant discharge and suction line assembly
• Aluminum / rubber construction for HVAC service applications
• R134a refrigerant type
• OE replacement design
• Includes gasket or seal
• Manifold and muffler included
• Female O-ring ends with UNF O-ring discharge and suction connections
• Switch port provision included
• O-rings included
• Fittings not included
• Bracket not included

Product Details

Four Seasons 55450 is a hose assembly for the A/C refrigerant circuit, combining discharge and suction line functions in one replacement part. The aluminum and rubber construction supports the routing and flexibility needed in HVAC service, while the female O-ring end style and UNF service connections match the listed OE-style application. The assembly also includes a manifold, muffler, gasket or seal, and switch port provision for systems that use those features.

For buyers searching for a Four Seasons 55450 hose assembly, this part is listed for Pontiac 6000, Buick Century, Chevrolet Celebrity, and Oldsmobile Cutlass Ciera and Cutlass Cruiser applications from the late 1980s and early 1990s. If you are replacing a leaking or damaged A/C hose on one of these vehicles, this OE replacement hose assembly provides the correct refrigerant-line format for R134a service.

This part cross-references Gates 34791 for the same application.

Common Problems This Part Can Address

• A/C refrigerant loss from a cracked or leaking hose assembly
• Damaged discharge or suction line connections
• Failed O-ring sealing surfaces at the hose ends
• Noise or restriction related to a worn hose muffler section
• Service issues on an aging GM HVAC hose assembly

Installation Notes and Tips

• Verify the vehicle’s refrigerant system uses R134a before installation.
• Inspect mating surfaces, O-ring seats, and service connections before assembly.
• Confirm the hose routing matches the original layout on the vehicle.
• Replace worn seals and evacuate/recharge the system according to HVAC service procedures.
• Check for leaks after installation and before returning the vehicle to service.

Quality Assurance

Four Seasons 55450 is an OE replacement HVAC hose assembly built for the listed vehicle applications and refrigerant system requirements. Its included seals, manifold, muffler, and switch port provision support a proper service replacement for compatible GM models.