【Vehicle Fitment】- Aluminium Engine Coolant Thermostat Housing Assembly Compatible with Buick LaCrosse 3.6L 2017-2019, Regal Sportback 3.6L 2018-2020; Chevy Blazer 3.6L 2019-2023; GMC Acadia 3.6L 2017-2023; Cadillac XT5 3.6L 2017-2023, XT6 3.6L 2020-2023. 【Replace Part Number】- 12678779, 12673659. 【Excellent Quality】- Made of high-quality material and maintains an excellent strength to give the parts long-term performance. 【Powerful Function】- Timely replacement of thermostat housing components will keep the engine at a stable operating temperature, prevent overheating, and extend engine life. Sensitive temperature control improves fuel efficiency, helping you save on fuel costs. Please double check that the replacement part number matches the part number you need before you buy, and then correspond to our product photos to see if they match the product you want! Upgrade Aluminium Engine Coolant Thermostat Housing Assembly Compatible with 2017-2023 Buick LaCrosse Regal GMC Acadia Chevy Blazer Cadillac XT5 XT6 3.6L, Replaces# 12678779, 12673659