The GMC brand is closely related to trucks. This means that almost anything that has the GMC brand is made to survive heavy-duty operation. That includes parts for standard features like the air-conditioning system like the GMC AC condenser which is an important part of the whole car AC system. This part of the AC system is what cools the compressed thus heated refrigerant. Open up the trunk of any GMC vehicle and you are sure to find the GMC AC condenser. This is the part which looks like a radiator although smaller. The AC condenser looks and works like the radiator as both share the same function which is to cool things. The radiator keeps the temperature of the engine coolant at its proper level while the AC condenser does the same for the refrigerant circulating in the system. The refrigerant is compressed first by the compressor turning the refrigerant into hot high-pressure gas. This is then passed on to the condenser where it is cooled by the flowing air on the outside. This cooling action transforms the refrigerant into liquid form. The liquid refrigerant is cooled further by passing it through an expansion valve. Cooled further, the liquid refrigerant is transformed into low-pressure gas refrigerant. This cooled refrigerant is what keeps the temperature in the any vehicle's cabin comfortably cool. It does so by absorbing the heat from the air in the cabin. The GMC AC condenser is usually located in front of the radiator, assuring it good access to the air flowing through the engine bay. This placement though means that the AC condenser is in jeopardy of being damaged in a frontend collision. This is just one of the situations when you will be forced to replace the AC condenser on your GMC. Although built to last a long time, the AC condenser could succumb to the extreme heat and vibration from the engine. These could weaken the condenser thus causing it to fail. It is recommended that the AC condenser be replaced before it fails on you in the most inconvenient time. And if it is GMC AC condenser you are looking for, you came to the right store.