Four Seasons 65921 A/C Refrigerant Discharge / Suction Hose Assembly

Four Seasons A/C Hose Assembly for Silverado and Sierra

The Four Seasons 65921 is an A/C refrigerant discharge and suction hose assembly built for select Chevrolet Silverado 1500 and GMC Sierra 1500 applications. It uses aluminum and rubber construction, includes a service port and gasket or seal, and is configured for R134A and R1234YF refrigerants.

Four Seasons Hose Assembly products are part of a focused HVAC line designed around mobile air conditioning service. This hose assembly is engineered and tested for dependable operation, with the goal of restoring proper refrigerant flow in the A/C system.

Key Features

• Part number 65921
• Discharge & suction line design
• Aluminum / rubber construction
• P-nut fitting on one end and flange on the other
• Service port included
• Gasket or seal included
• Built for R134A and R1234YF refrigerant systems
• Includes muffler; no bracket and no switch service port

Detailed Description

This Four Seasons 65921 hose assembly is a direct-fit HVAC line for select Chevrolet Silverado 1500 and GMC Sierra 1500 trucks. It is designed as a discharge and suction line assembly, with a P-nut fitting and flange connection to match the specified vehicle applications. The aluminum and rubber construction supports the routing and sealing demands of modern truck A/C systems, while the included service port and seal help complete the refrigerant line connection.

Use this part when servicing the A/C refrigerant line on 2019-2023 Chevrolet Silverado 1500, 2019-2023 GMC Sierra 1500, 2022 Chevrolet Silverado 1500 LTD, and 2022 GMC Sierra 1500 Limited applications. The Four Seasons 65921 is also cross-referenced to 212328 for the same application.

What It Is Used For

• Replacing a leaking or damaged A/C discharge/suction hose assembly
• Restoring refrigerant circulation in Silverado 1500 and Sierra 1500 HVAC systems
• Addressing cracked, corroded, or worn hose connections
• Repairing service-port-related sealing issues in the A/C line
• Correcting refrigerant line fitment on R134A and R1234YF systems

Installation Notes and Tips

• Verify the vehicle’s year, make, model, and refrigerant type before ordering.
• Inspect mating surfaces, seals, and O-rings during installation.
• Recover refrigerant and evacuate the system before removing the existing hose assembly.
• Confirm the P-nut and flange connections align with the vehicle’s original routing.
• After installation, check the system for leaks and proper A/C operation.

Quality Assurance

Four Seasons backs this hose assembly with more than 50 years of mobile A/C experience and product testing focused on long-term, trouble-free operation. Part number 65921 is built to meet the demands of select Chevrolet Silverado 1500 and GMC Sierra 1500 HVAC service applications.