SKP SK121191 Engine Coolant Thermostat Housing - Rear

Engine Coolant Thermostat Housing for GM Small Cars

SKP SK121191 is an engine coolant thermostat housing made from plastic PA66-GF30 for reliable coolant routing in select Chevrolet and Buick applications. It is a direct-fit style replacement for vehicles that use a rear water outlet plastic housing, including Chevrolet Cruze, Cruze Limited, Sonic, Trax, and Buick Encore models.

Key Features

• Engine coolant thermostat housing for the cooling system
• Plastic construction: PA66-GF30
• Fits rear water outlet plastic applications where specified
• Direct replacement part number SK121191
• Cross-references ACDelco 15-11072 and 15-11105 for the same application

Fitment Details

• Fits 2019-2021 Buick Encore, rear, water outlet plastic.
• Fits 2018-2021 Chevrolet Trax, water outlet plastic.
• Fits 2018-2020 Chevrolet Sonic, water outlet plastic.
• Fits 2013-2018 Buick Encore.
• Fits 2012-2017 Chevrolet Sonic.
• Fits 2013-2017 Chevrolet Trax.
• Fits 2016 Chevrolet Cruze Limited, rear, water outlet plastic.
• Fits 2011-2015 Chevrolet Cruze.

What This Part Helps Address

• Coolant leaks at the thermostat housing or water outlet
• Cracked or warped plastic housing from heat cycling
• Overheating caused by restricted coolant flow
• Coolant loss from a damaged sealing surface
• Temperature control issues tied to a failing housing assembly

Installation Notes and Tips

Confirm the original housing style, position, and engine cooling layout before installation. Clean the mating surfaces thoroughly and inspect the thermostat, seals, and adjacent coolant hoses for wear before reassembly. Verify the fitment against the vehicle application and part number SK121191 before ordering.

Quality Assurance

SKP manufactures this thermostat housing with PA66-GF30 plastic for strength and heat resistance in cooling-system service. The part number SK121191 is listed with direct interchange references for common OE-style replacement applications.