Four Seasons 55891 A/C Refrigerant Discharge / Suction Hose Assembly

Overview of Four Seasons Hose Assembly 55891

The Four Seasons Hose Assembly 55891 is designed for reliable performance in heavy-duty Chevrolet and GMC trucks. This A/C refrigerant discharge and suction hose assembly is engineered to meet OEM specifications for the Chevrolet Silverado 2500 HD, Silverado 3500, Sierra 2500 HD, and Sierra 3500 models.

• Constructed with durable aluminum and rubber materials
• Compatible with R134a refrigerant systems
• Includes essential gaskets and multiple O-rings for secure sealing
• Features P-nut fittings on both discharge and suction ends
• Equipped with a muffler and manifold block for noise reduction and system efficiency
• Includes a switch service port but does not come with a switch or bracket

Four Seasons Hose Assembly Product Line Details

The Hose Assembly product line by Four Seasons focuses on providing complete A/C hose solutions that combine durability and precise fitment. This line is tailored to replace original equipment parts with components that maintain system integrity, including necessary seals and fittings. The 55891 hose assembly exemplifies this approach by integrating multiple O-rings and a muffler to ensure proper refrigerant flow and noise control in heavy-duty truck applications.

Detailed Product Description

This A/C refrigerant discharge and suction hose assembly is constructed from a combination of aluminum and rubber, offering a balance of strength and flexibility. It is designed specifically for use with R134a refrigerant, the standard for many modern automotive A/C systems. The assembly includes a manifold block and a muffler to reduce vibration and noise during operation. Both the discharge and suction ends utilize P-nut fittings for secure connections. The package includes a full set of O-rings—slimline washers and sealing washers—to ensure leak-free installation. While the assembly features a switch service port, the switch itself is not included, and the assembly does not come with a mounting bracket.

Applications and Common Issues Addressed

• Replacement of worn or leaking A/C refrigerant hoses in Chevrolet Silverado 2500 HD and 3500 models
• Repair of damaged or cracked hoses in GMC Sierra 2500 HD and 3500 trucks
• Resolution of refrigerant leaks caused by failed seals or fittings
• Elimination of excessive A/C system noise through integrated muffler
• Restoration of proper refrigerant flow and pressure in heavy-duty truck A/C systems

Installation Notes and Tips

• Ensure compatibility with Chevrolet Silverado 2500 HD, Silverado 3500, GMC Sierra 2500 HD, and Sierra 3500 before installation
• Use the included O-rings and gaskets to prevent refrigerant leaks
• Verify that P-nut fittings are properly tightened to manufacturer torque specifications
• Inspect the switch service port for proper access if A/C system diagnostics are required
• Do not reuse old seals or washers to maintain system integrity

Quality Assurance and Warranty

The Four Seasons Hose Assembly 55891 is an OEM replacement part designed to meet original equipment standards. It includes all necessary seals and fittings to ensure a secure and leak-free installation. While specific warranty details are not provided here, Four Seasons products typically come with a limited warranty covering defects in materials and workmanship. Always consult the product packaging or manufacturer documentation for exact warranty terms.