Four Seasons 56421 A/C Refrigerant Discharge Hose

Reliable A/C Refrigerant Discharge Hose for GM SUVs

The Four Seasons Hose Assembly 56421 is designed to provide dependable performance for your vehicle's HVAC system. Engineered specifically for select Cadillac, Chevrolet, and GMC models, this A/C refrigerant discharge hose ensures proper refrigerant flow and system integrity.

• Compatible with R134a refrigerant systems
• Includes gasket and fittings for secure installation
• Equipped with a switch service port (M10x1.250) for diagnostic access
• O-ring slimline washers (part number 24402) included, quantity of two
• Designed without bracket or muffler for direct fitment
• OE replacement part ensuring factory-level compatibility
• Suction end features a P-nut fitting for reliable connection

Four Seasons Hose Assembly Product Line Overview

The Hose Assembly line from Four Seasons focuses on delivering precise HVAC hose and pipe solutions tailored to specific vehicle applications. This product line emphasizes exact fitment and includes necessary seals and fittings to streamline installation. The 56421 discharge hose is part of this line, offering a direct OE replacement for improved system reliability in your GM SUV.

Detailed Product Description

This A/C refrigerant discharge hose is engineered for use with R134a refrigerant, common in many modern GM vehicles. It features a discharge line component type with included gaskets and fittings to ensure a leak-free connection. The hose assembly comes with a switch service port sized M10x1.250, allowing for system pressure monitoring or service without removing the hose. Two slimline washer O-rings (part number 24402) are included to maintain a secure seal. The design excludes a bracket and muffler, focusing on a straightforward replacement that matches original equipment specifications. The suction end uses a P-nut fitting, facilitating a secure and proper connection to the vehicle's A/C system.

Compatible Vehicles and Applications

• Cadillac Escalade and Escalade ESV
• Chevrolet Suburban 1500 and 2500
• Chevrolet Tahoe
• GMC Yukon, Yukon XL 1500, and Yukon XL 2500

This hose assembly is intended for use in the A/C refrigerant discharge line, helping to maintain proper refrigerant flow and pressure within the HVAC system.

Common Issues Addressed by This Hose Assembly

• Leaking refrigerant due to worn or damaged discharge hose
• Loss of A/C system pressure affecting cooling performance
• Corroded or damaged fittings causing refrigerant leaks
• Faulty or missing O-rings leading to system inefficiency
• Difficulty accessing service ports for diagnostics without proper hose design

Installation Notes and Tips

When installing the Four Seasons Hose Assembly 56421, ensure all included gaskets and O-rings are properly seated to prevent leaks. The switch service port allows for pressure testing without hose removal, so verify port integrity during installation. Since this hose does not include a bracket or muffler, confirm that the hose routing matches OEM specifications to avoid contact with moving parts or heat sources. Use appropriate tools for the P-nut fitting to avoid damage during connection.

Quality Assurance and Warranty

Four Seasons provides this hose assembly as an OE replacement part, meeting original equipment standards for fit and function. The inclusion of all necessary seals and fittings supports a reliable installation. While specific warranty details are not provided here, Four Seasons products typically come with a limited warranty covering defects in materials and workmanship.