Four Seasons 55803 A/C Refrigerant Discharge / Suction Hose Assembly

Four Seasons 55803 A/C Hose Assembly

Four Seasons 55803 is an OE replacement A/C refrigerant discharge and suction hose assembly for select Buick, Oldsmobile, and Pontiac applications. Built with aluminum and rubber construction, it is made for R134a systems and includes the seals needed for a proper refrigerant connection.

This Four Seasons hose assembly is a direct-fit service part for 1989-1990 Buick LeSabre, 1989-1990 Oldsmobile 98, 1989-1990 Oldsmobile Delta 88, and 1989-1990 Pontiac Bonneville. It is a manifold-style line with dual O-ring female O-ring ends, a muffler, and a switch port.

Key Features

• Part number: 55803
• Discharge and suction line assembly
• Aluminum / rubber construction
• R134a refrigerant system application
• OE replacement design
• Manifold style with muffler
• Dual O-ring female O-ring ends
• Includes gasket or seal and O-rings
• Switch port included; switch not included
• Fittings not included
• Bracket not included

Product Details

Four Seasons Hose Assembly line products are built for HVAC service work where the refrigerant path, sealing surfaces, and connection style must match the original layout. The 55803 hose assembly uses aluminum and rubber materials to balance routing flexibility with the rigidity needed at the connection points. It is configured as a discharge and suction line assembly for R134a systems and uses dual O-ring female O-ring ends for the discharge and suction connections.

For fitment-focused searches, this part is commonly referenced for 1989-1990 Buick LeSabre A/C hose assembly replacement, 1989-1990 Oldsmobile 98 refrigerant line service, 1989-1990 Oldsmobile Delta 88 HVAC hose replacement, and 1989-1990 Pontiac Bonneville A/C line repair. This part cross-references Gates 34783 and UAC HA5764C for the same application.

Common Problems This Part Addresses

• Refrigerant leakage at worn hose seals or O-ring connections
• Cracked, hardened, or deteriorated A/C hose material
• Poor A/C performance caused by damaged discharge or suction lines
• Service issues at the switch port connection area
• Fitment problems from a failed OE-style hose assembly

Installation Notes and Tips

• Verify the vehicle uses an R134a system before installation.
• Inspect mating surfaces and replace worn seals as needed.
• Confirm the hose routing matches the original discharge and suction line layout.
• Transfer or connect the required fittings separately, since fittings are not included.
• Check the switch port and manifold connections for proper alignment before evacuating and recharging the system.

Quality Assurance

Four Seasons 55803 is an OE replacement hose assembly built for direct service use in select Buick, Oldsmobile, and Pontiac vehicles. It is supplied with the sealing components specified in the product data for a proper HVAC connection.