Four Seasons 66021 A/C Refrigerant Suction Hose

Overview of Four Seasons Hose Assembly 66021

The Four Seasons Hose Assembly 66021 is designed specifically for Chevrolet and GMC trucks, including the Sierra 1500 and Silverado 1500 models. This A/C refrigerant suction hose ensures reliable low-pressure refrigerant flow within your vehicle's HVAC system.

• Constructed from durable aluminum and rubber materials
• Features a P-nut fitting on the suction end for secure connection
• Includes sealing washers and slimline O-rings for leak prevention
• Compatible with R134-a refrigerant systems
• OE replacement part designed for direct fit without modifications
• Includes necessary fittings and gaskets for installation
• Does not include a service port, bracket, muffler, or switch

Four Seasons Hose Assembly Product Line Details

The Four Seasons Hose Assembly product line focuses on providing reliable hose assemblies for HVAC systems in various vehicle applications. The 66021 part is part of this line, offering a combination of aluminum and rubber construction to withstand typical HVAC system pressures and conditions. This line emphasizes compatibility with original equipment specifications, ensuring proper fit and function for Chevrolet and GMC trucks.

Detailed Product Description

The Four Seasons 66021 A/C refrigerant suction hose is engineered to handle low-pressure refrigerant flow in R134-a systems. Its aluminum and rubber construction balances flexibility and durability, while the P-nut fitting on the suction end and sealing washer on the opposite end provide secure, leak-resistant connections. The hose assembly includes two slimline O-rings (part number 24404) to maintain a tight seal. This part is designed as a direct OE replacement for Chevrolet Sierra 1500 and GMC Silverado 1500 models, ensuring compatibility and ease of installation without the need for additional modifications.

Common Applications and Issues Addressed

• Replacement of worn or cracked A/C refrigerant suction hoses
• Resolving low refrigerant pressure due to hose leaks
• Fixing poor A/C system performance caused by damaged suction lines
• Eliminating refrigerant leaks at connection points
• Restoring proper refrigerant flow in Chevrolet Sierra 1500 and GMC Silverado 1500 HVAC systems

Installation Notes and Tips

When installing the Four Seasons 66021 hose assembly, ensure all O-rings and sealing washers are properly seated to prevent leaks. The included fittings and gaskets should be used as supplied. This hose assembly does not include a bracket or muffler, so verify existing mounting points are secure before installation. Since this part lacks a service port, refrigerant charging or evacuation should be performed using the vehicle’s existing service ports. Always follow manufacturer torque specifications for P-nut fittings to avoid damage.

Quality Assurance and Warranty

Four Seasons products are manufactured to meet or exceed original equipment standards. The 66021 hose assembly is an OE replacement part, ensuring compatibility and reliability for Chevrolet Sierra 1500 and GMC Silverado 1500 vehicles. While specific warranty details are not provided here, Four Seasons typically offers limited warranties covering defects in materials and workmanship. Consult product documentation or the manufacturer for exact warranty terms.