Hi Victor, I'm pleased to assist you. The thermostat in a 2019 GMC Acadia is located under the intake manifold, on the passenger side of the engine. It is bolted to the engine block and has two hoses connected to it: one from the upper radiator hose and one to the water pump. To access the thermostat, you will need to remove the intake manifold. This is a complex job that should be done by a qualified mechanic. We have the thermostat with the housing and the thermostat gasket. Let me provide you with the two links below to complete your order while supplies last. Thermostat housing - https://www.carparts.com/search?q=thermostat_housing&vehicle[model]=Acadia&vehicle[make]=GMC&vehicle[year]=2019&can=CPGG4850_CSQA_20231024 Thermostat gasket - https://www.carparts.com/search?q=thermostat_gasket&vehicle[model]=Acadia&vehicle[make]=GMC&vehicle[year]=2019&can=CPGG4850_CSQA_20231024 The part that you have chosen is a purge valve which you may also need to replace. If so, use the link below to directly place your order while supplies last. Purge valve - https://www.carparts.com/purge-valve/ac-delco/ac12630282?can=CPGG4850_CSQA_20231024 I hope this helps, and happy shopping!

Hi Victor, I'm glad to assist you. We cannot confirm 100% if this is the cause of the trouble (A/C not working) in your vehicle. The purge valve is not directly related to the climate control of your vehicle. It is for the fuel system. We recommend you consult a certified mechanic for proper troubleshooting and diagnostics.

Hi Vichai, I'm pleased to assist you. The purge valve is usually located on the engine compartment of your 2019 GMC Acadia, under the plastic engine cover. It is attached to the intake manifold by two hoses. To place your order straight away, use the link below while supplies last. I hope this helps, and happy shopping! https://www.carparts.com/purge-valve/ac-delco/ac12630282?can=CPGG4850_CSQA_20231020

Hi Vichai, I'm pleased to assist you. It is possible that a bad purge valve could cause problems refueling your 2019 GMC Acadia. The purge valve is part of the evaporative emissions system (EVAP), which helps to prevent fuel vapors from escaping into the atmosphere. When the purge valve fails, it can cause a vacuum to form in the fuel tank, making it difficult or impossible to refuel. Use the link below to place your order directly while supplies last. I hope this helps, and happy shopping! https://www.carparts.com/purge-valve/ac-delco/ac12630282?can=CPGG4850_CSQA_20231020