Four Seasons 66638 A/C Refrigerant Discharge / Suction Hose Assembly

OE Replacement A/C Hose Assembly

Four Seasons 66638 is an OE replacement A/C refrigerant discharge and suction hose assembly built for R134a systems. It combines aluminum and rubber construction with a manifold and muffler to match the original routing and connection style used on select Chevrolet Equinox and GMC Terrain applications.

Compatible With 2015-2017 Chevrolet Equinox and 2015-2017 GMC Terrain applications, this hose assembly is built for direct replacement service where the original line has leaked, cracked, or lost sealing integrity. Four Seasons hose assembly 66638 is a practical choice for restoring refrigerant flow in the HVAC system.

Key Features

• Part number 66638
• Discharge and suction line assembly for A/C service
• Aluminum / rubber construction
• R134a refrigerant system application
• Manifold included with muffler
• OE replacement design
• P-nut fitting on discharge and suction ends
• Gasket or seal included
• O-rings included
• Without service port, switch port, or bracket

Product Details

This Four Seasons Hose Assembly line is built for HVAC repair work that requires an OE-style replacement rather than a universal hose. The 66638 assembly uses the correct discharge and suction line configuration, with aluminum and rubber materials selected to match factory-style routing and vibration control. It also includes the sealing components needed for installation, along with a manifold and muffler for the specified application.

This part cross-references UAC HA111988C for the same application. Four Seasons 66638 is listed for 2015 Chevrolet Equinox, 2016-2017 Chevrolet Equinox, and 2015-2017 GMC Terrain, making it a direct-fit option for those vehicle-specific HVAC repairs.

Common Repair Symptoms

• Refrigerant loss from a cracked or leaking hose assembly
• Damaged hose fittings at the compressor or line connection
• Reduced A/C performance from restricted refrigerant flow
• Oil residue or staining around the hose connection points
• Noise or vibration from a deteriorated line assembly

Installation Notes

Verify the vehicle’s A/C system uses R134a refrigerant and confirm the hose routing, fitting style, and application notes before installation. This assembly is specified without a service port, switch port, or bracket, so the original vehicle configuration should be matched carefully. Replace the sealing surfaces as required and evacuate and recharge the system according to factory service procedures after installation.

Quality Assurance

Four Seasons 66638 is an OE replacement hose assembly built to match the listed vehicle applications and factory-style connection requirements. The included seals and O-rings support proper system sealing when installed correctly on the specified Chevrolet Equinox and GMC Terrain models.