Four Seasons 66203 A/C Liquid Line with Orifice Tube

Overview of Four Seasons Hose Assembly 66203

The Four Seasons Hose Assembly 66203 is a precision-engineered A/C liquid line designed for select Chevrolet and GMC heavy-duty trucks. This aluminum liquid line hose assembly includes an orifice tube and is built to meet original equipment specifications for reliable HVAC performance.

• Constructed from durable aluminum material
• Compatible with R134a refrigerant systems
• Includes gasket and fittings for secure installation
• Equipped with a serviceable orifice tube and service port
• Features P-nut fittings and a mounting bracket for proper fitment
• Designed as an OE replacement for Chevrolet and GMC heavy-duty trucks

Detailed Product Description

This Four Seasons Hose Assembly from the Hose Assembly product line is specifically designed as an A/C liquid line with an integrated orifice tube, suitable for R134a refrigerant systems. The assembly is made from aluminum, providing corrosion resistance and durability under high-pressure HVAC conditions. It includes two slimline washer O-rings (part number 24402) to ensure a tight seal and prevent refrigerant leaks. The hose assembly features P-nut fittings on both the liquid and suction ends, facilitating a secure connection to the vehicle's A/C system.

The assembly also comes with a service port sized at 16 mm, equipped with an R134a quick disconnect for easy servicing. A mounting bracket is included to ensure proper positioning and stability within the engine compartment. This part is an exact OE replacement, designed to fit Chevrolet and GMC models such as the Sierra 2500 HD, Sierra 3500 HD, Silverado 2500 HD, and Silverado 3500 Classic, among others.

Compatible Vehicles and Applications

• Chevrolet Sierra 2500 HD and Sierra 2500 HD Classic
• Chevrolet Sierra 3500 HD
• Chevrolet Silverado 2500 HD and Silverado 2500 HD Classic
• Chevrolet Silverado 3500 Classic and Silverado 3500 HD
• GMC Sierra 2500 HD and Sierra 3500 HD

Common Issues Addressed by This Hose Assembly

• Leaking or damaged A/C liquid lines causing refrigerant loss
• Clogged or malfunctioning orifice tube affecting cooling efficiency
• Corroded or worn fittings leading to poor system pressure
• Faulty or missing service ports complicating A/C maintenance
• Improper hose mounting causing vibration or premature wear

Installation Notes and Tips

• Ensure system is fully evacuated and depressurized before removal
• Replace O-rings with the included slimline washers to maintain seal integrity
• Verify correct orientation of the orifice tube during installation
• Use the included bracket to secure the hose assembly and prevent movement
• Check for leaks after installation using appropriate A/C service equipment

Quality Assurance and Warranty

Four Seasons Hose Assembly 66203 is manufactured to meet or exceed original equipment standards, ensuring compatibility and durability for Chevrolet and GMC heavy-duty trucks. The part includes all necessary fittings and seals for a complete replacement. While specific warranty details are not provided here, Four Seasons products typically come with a limited warranty covering defects in materials and workmanship.