12673659 12678779 Thermostat Housing Replacement for LaCrosse Regal Sportback Blazer XT5 XT6 3.6L 2017-2023 Replace Part Number: Replacement for 12678779 Replacement for 12673659 Replacement for: Replacement for LaCrosse 3.6L 2017-2019 Replacement for Regal Sportback 3.6L 2018-2020 Replacement for XT5 3.6L 2017-2023 Replacement for XT6 3.6L 2020-2023 Replacement for Blazer 3.6L 2019-2023 Replacement for Acadia 3.6L 2017-2023 Feature: Coolant thermostat keeps engine running at proper operating temperature This coolant thermostat housing is easy to install, but professional installation is always recommended Package Included: 1 x coolant thermostat housing