Four Seasons 65321 A/C Refrigerant Discharge / Suction Hose Assembly

Four Seasons 65321 A/C Hose Assembly

Four Seasons 65321 is a discharge and suction line hose assembly for R134A air conditioning systems. Built with aluminum and rubber construction, it is made for Chevrolet Silverado 2500 HD and Silverado 3500 HD, as well as GMC Sierra 2500 HD and Sierra 3500 HD applications from 2020-2025.

This Four Seasons hose assembly uses P-nut fittings on both ends and includes the gasket or seal. It also features a muffler and a switch service port, while the bracket is not included. For buyers searching for a Chevrolet Silverado 2500 HD A/C hose assembly or a GMC Sierra 3500 HD refrigerant discharge and suction hose, part number 65321 is the direct reference.

Key Features

• Discharge and suction line hose assembly for mobile A/C service
• Aluminum / rubber construction for the hose body
• P-nut fitting on End 1 and End 2
• Built for R134A refrigerant systems
• Gasket or seal included
• Switch service port included
• Muffler included
• Bracket not included
• Service port not included

Product Details

Four Seasons Hose Assembly line products are engineered and tested for long-term operation in automotive HVAC systems. Part number 65321 is a direct-fit style refrigerant hose assembly for 2020-2025 Chevrolet Silverado 2500 HD and Silverado 3500 HD, plus 2020-2025 GMC Sierra 2500 HD and Sierra 3500 HD models. This part cross-references UAC HA114404C for the same application.

What This Part Helps Fix

• Refrigerant leaks at a damaged hose assembly
• Loss of A/C performance from cracked or worn hose material
• Improper refrigerant flow in the discharge and suction line
• Service issues related to a missing or failed switch service port
• Noise or vibration concerns addressed by the integrated muffler

Installation Notes

Verify R134A system requirements, fitting style, and routing before installation. Confirm the P-nut connections, switch service port location, and bracket requirements against the original hose assembly on the vehicle. Replace the included gasket or seal during installation and inspect adjacent A/C components for wear, contamination, or refrigerant loss before recharging the system.

Quality Assurance

Four Seasons backs this hose assembly with more than 50 years of mobile A/C experience and product testing focused on dependable operation. Part number 65321 is built to meet the demands of Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500 HD, GMC Sierra 2500 HD, and GMC Sierra 3500 HD HVAC service.