Four Seasons 86363 Engine Coolant Thermostat Housing Assembly

Thermal Management Module for GM Applications

Four Seasons 86363 is an engine coolant thermostat housing assembly built as a thermal management module with an actuator. It is made from plastic, includes a gasket or seal, and is specified with a 1.56 in inlet diameter, 0.69 in mounting flange width, and 7.000 in overall height.

Compatible with select Buick, Cadillac, Chevrolet, and GMC models, this Four Seasons Thermal Module line part is intended for vehicles that use an integrated coolant control housing. Four Seasons 86363 is a direct-fit style replacement for thermal module service on applications such as the Buick Envision, Cadillac XT4, Cadillac XT5, Cadillac XT6, Chevrolet Blazer, and GMC Acadia.

Key Features

• Engine coolant thermostat housing assembly with actuator
• Thermal management module design
• Plastic housing construction
• Gasket or seal included
• Thermostat not included
• 1.56 in inlet diameter
• 0.69 in mounting flange width
• 7.000 in overall height

Fitment Details

• Fits 2021-2025 Buick Envision, N/A, Thermal Module
• Fits 2019-2025 Cadillac XT4, N/A, Thermal Module
• Fits 2020-2025 Cadillac XT5, N/A, Thermal Module
• Fits 2021-2025 Cadillac XT6, N/A, Thermal Module
• Fits 2020-2025 Chevrolet Blazer, N/A, Thermal Module
• Fits 2020-2023 GMC Acadia, N/A, Thermal Module

What This Part Helps Address

• Coolant leaks at the thermostat housing or seal area
• Cracked or warped plastic coolant housing
• Faulty thermal module actuator operation
• Improper engine coolant flow control
• Overheating concerns tied to housing or control module failure

Installation Notes and Tips

Verify the inlet diameter, flange width, and overall height against the original part before installation. Confirm that the vehicle uses a thermal management module with actuator and that the thermostat is serviced separately, since the thermostat is not included. For best results, inspect the mating surfaces and replace the gasket or seal only if the sealing surfaces are clean and undamaged.

Quality Assurance

Four Seasons backs this Thermal Module line with more than 50 years of mobile A/C experience and states that its products are engineered and tested for years of trouble-free operation. Four Seasons 86363 is built for dependable coolant system service on the listed Buick, Cadillac, Chevrolet, and GMC applications.

This part cross-references Focus Auto Parts 86363 for the same application.