Four Seasons 66636 A/C Refrigerant Liquid Hose

OE-Style A/C Liquid Hose Assembly

The Four Seasons 66636 is a high-pressure A/C refrigerant liquid hose assembly built for OE replacement service. It uses aluminum and rubber construction, is set up for R134-A refrigerant, and includes the service port and seals needed for the listed applications.

Compatible with 2010-2017 Chevrolet Equinox and 2010-2017 GMC Terrain, this liquid line hose assembly is specified without an orifice tube and without a bracket. The Four Seasons Hose Assembly line focuses on direct-fit HVAC hose and pipe replacement parts for vehicle-specific service.

Key Features

• Part number: 66636
• Liquid line hose assembly for high-pressure A/C service
• Aluminum / rubber construction
• R134-A refrigerant type
• Includes gasket or seal
• Includes service port, 16 mm size, high-side location
• Without switch port
• Without bracket
• With orifice tube
• OE replacement part

Detailed Product Description

Four Seasons 66636 is a liquid line hose assembly engineered for the high-pressure side of the air conditioning system. It is built with aluminum and rubber materials to match the routing and connection requirements of the original equipment layout, and it includes one slim line sealing washer and one slimline washer for the specified connections. This part number 66636 is listed as an OE replacement and is configured for R134-A refrigerant systems.

This hose assembly is listed for 2010-2017 Chevrolet Equinox and 2010-2017 GMC Terrain applications. If you are replacing a leaking or damaged A/C liquid hose on a Chevrolet Equinox or GMC Terrain, Four Seasons 66636 provides the correct liquid line configuration with the service port and orifice tube details called out in the product data.

This part cross-references TYC 700119 for the same application.

Common Problems This Part Can Address

• A/C refrigerant leak at the liquid line hose
• Damaged or cracked hose assembly on the high-pressure side
• Failed sealing washers or gasket surfaces
• Service port wear or leakage at the high-side connection
• Incorrect hose configuration during HVAC repair on Equinox or Terrain models

Installation Notes and Tips

• Verify the vehicle uses R134-A refrigerant before installation.
• Confirm the high-side liquid line routing and connection points match the original hose.
• Replace worn seals and inspect mating surfaces before assembly.
• Check that the service port and orifice tube configuration matches the vehicle’s HVAC setup.
• After installation, evacuate and recharge the system according to factory service procedures.

Quality Assurance

Four Seasons 66636 is an OE replacement hose assembly built for vehicle-specific HVAC service. Its listed materials, seal inclusion, and application data support accurate replacement on the confirmed Chevrolet Equinox and GMC Terrain fitments.

• Fits 2010-2017 Chevrolet Equinox, N/A; Hose Assembly; Fitment: Without Orifice Tube.
• Fits 2010-2017 GMC Terrain, N/A; Hose Assembly; Fitment: Without Orifice Tube.