ACDelco Professional Engine Cooling Fan Clutches control the speed of the radiator fan based on the temperature of the air after it passes through the radiator fins, and are the ideal high quality replacement for your GM vehicle. The clutch contains a special viscous silicone fluid that transfers force between the two halves of the clutch. A bi-metallic element on the front of the clutch housing controls an internal valve that regulates the clutch engagement. When the radiator is cold, the fan clutch slips, and when the radiator is hot, the clutch is engaged. There are some electromagnetic fan clutches that perform similarly to the viscous fan clutch. These Professional, premium aftermarket replacement engine cooling fan clutches are manufactured to meet or exceed your expectations for fit, form, and function.When it comes to replacing your heating and cooling components, ACDelco offers a full line of Professional, premium aftermarket Air Conditioning Parts. In addition, ACDelco also offer O-rings, seals, switches, valves, and other associated hardware to make part replacement simple and precise. ACDelco Professional Air Conditioning Parts fit your GM vehicle as well as a wide range of other vehicles on the road today. For an ideal Professional, premium aftermarket replacement part, look no further than ACDelco Professional Air Conditioning Parts.To keep you cool in hot weather driving, ACDelco offers GM Original Equipment and premium aftermarket Professional Air Conditioning Parts. Built to fit most GM vehicles on the road today, ACDelco Air Conditioning Parts include a complete range of components, from accumulators, blower motors, compressors, and condensers to filters, evaporators, and engine cooling motors. ACDelco Air Conditioning Parts are manufactured using the latest technology to deliver the reliability and durability expected of ACDelco. On a hot day, there’s nothing like a cool rush of air. Make sure that refreshing air keeps flowing, even on the hottest days, with ACDelco Air Conditioning Parts.