Four Seasons 66647 A/C Refrigerant Discharge / Suction Hose Assembly

Reliable A/C Refrigerant Hose Assembly for Chevrolet and GMC Trucks

The Four Seasons Hose Assembly part number 66647 is designed specifically for heavy-duty Chevrolet and GMC trucks, including the Sierra 2500 HD, Sierra 3500 HD, Silverado 2500 HD, and Silverado 3500 HD models. This A/C refrigerant discharge and suction hose assembly ensures proper refrigerant flow and system efficiency for vehicles using R134a refrigerant.

• Constructed from durable aluminum and rubber materials for long-lasting performance
• Includes multiple O-rings and slimline washers for secure sealing
• Equipped with a flange-style discharge end and P-nut fitting suction end
• Features a built-in muffler and manifold for noise reduction and system integration
• Comes with a service port and switch service port (switch not included)
• OE replacement part designed to meet original equipment specifications

About the Four Seasons Hose Assembly Product Line

The Four Seasons Hose Assembly line focuses on providing high-quality HVAC hoses and pipes engineered to meet or exceed OEM standards. This product line emphasizes durability and precise fitment, ensuring compatibility with specific vehicle models. The 66647 hose assembly is part of this line, offering a reliable solution for refrigerant discharge and suction needs in heavy-duty Chevrolet and GMC trucks.

Detailed Product Description

This A/C refrigerant discharge and suction hose assembly (part number 66647) is constructed with a combination of aluminum and rubber materials, providing strength and flexibility where needed. It is designed for use with R134a refrigerant systems and includes all necessary O-rings—two slimline washers (part number 24402), one green O-ring (part number 24606), and two additional slimline washers (part number 24404)—to ensure leak-free connections. The discharge end features a flange style for secure attachment, while the suction end uses a P-nut fitting for reliable sealing. The assembly also includes a muffler to reduce noise and a manifold for system integration. A service port and switch service port are incorporated for maintenance access, although the switch itself is not included. This hose assembly is an OE replacement part, designed to fit Chevrolet and GMC heavy-duty trucks such as the Sierra 2500 HD, Sierra 3500 HD, Silverado 2500 HD, and Silverado 3500 HD.

Common Applications and Issues Addressed

• Replacement of worn or leaking A/C refrigerant discharge and suction hoses
• Restoring proper refrigerant flow in R134a A/C systems
• Eliminating noise caused by damaged or missing mufflers in the hose assembly
• Resolving refrigerant leaks due to faulty O-rings or seals
• Maintaining system integrity with OE-quality manifold and fittings

Installation Notes and Tips

Ensure the vehicle is compatible with R134a refrigerant before installation. Verify that all included O-rings and slimline washers are properly seated to prevent leaks. The flange discharge end and P-nut fitting suction end require correct torque specifications to maintain a secure connection. The service port and switch service port provide access points for system diagnostics and maintenance; however, the switch is not included and must be sourced separately if needed. Professional installation is recommended to ensure proper fit and function.

Quality Assurance and Warranty

Four Seasons Hose Assembly part number 66647 is manufactured to meet original equipment standards for Chevrolet and GMC heavy-duty trucks. The inclusion of multiple O-rings and a muffler reflects attention to detail in design and durability. While specific warranty details are not provided, Four Seasons products typically adhere to industry quality controls to ensure reliable performance in HVAC applications.