Four Seasons 56409 A/C Refrigerant Discharge / Suction Hose Assembly

OE Replacement A/C Hose Assembly

Four Seasons 56409 is an OE replacement A/C refrigerant discharge and suction hose assembly for select Chevrolet and GMC trucks. Built with aluminum and rubber construction, it is made for R134a systems and includes the seals needed for a proper refrigerant connection.

Compatible with 1999-2002 Chevrolet C1500, 1999-2002 Chevrolet Silverado 1500, and 1999-2002 GMC Sierra 1500, this Four Seasons hose assembly 56409 is a direct-fit service part for common HVAC line replacement needs.

Key Features

• Brand: Four Seasons Hose Assembly
• Part number: 56409
• Type: A/C refrigerant discharge and suction line
• Material: aluminum / rubber
• Refrigerant type: R134a
• OE replacement design
• Manifold included
• Switch port included
• Gasket or seal included
• O-rings included
• Discharge and suction ends use P-nut fittings
• Fittings not included
• Bracket not included
• Service port not included
• Muffler not included

Product Details

Four Seasons 56409 is a hose assembly from the Four Seasons Hose Assembly line, built for HVAC service where the refrigerant line must connect the compressor-side discharge and suction routing in one OE-style assembly. The aluminum and rubber construction balances routing flexibility with the rigidity needed for secure A/C line placement, while the included seals and O-rings support proper sealing at the connection points. This part number 56409 is listed for R134a applications and is a direct replacement choice for 1999-2002 Chevrolet C1500, 1999-2002 Chevrolet Silverado 1500, and 1999-2002 GMC Sierra 1500.

This part cross-references Dorman - HELP 56409 and Gates 51746 for the same application.

Common Problems This Part Can Address

• Refrigerant loss from cracked or leaking A/C hose sections
• Damaged discharge or suction line connections
• Failed sealing surfaces at hose-to-component joints
• Corrosion or wear in aging HVAC hose assemblies
• Poor A/C system performance caused by line leakage

Installation Notes and Tips

Before installation, verify the vehicle uses R134a refrigerant and confirm the hose routing matches the original assembly. Replace worn sealing surfaces and inspect mating components for damage, contamination, or corrosion before connecting the new line. Because this assembly is listed without a bracket, without fittings, and without a service port, transfer and reuse only the vehicle-specific components that apply to your original setup.

Quality Assurance

Four Seasons manufactures OE replacement HVAC components for service applications that require correct fitment and sealing performance. This hose assembly is built to match the listed vehicle applications and line configuration for dependable A/C system repair.