GMC Sierra 2500 HD Radiator Fan Clutch Replacement Cost

Know what price you should pay to get your vehicle fixed.

The average cost for a GMC Sierra 2500 HD radiator fan clutch replacement is between $293 and $403. Labor costs are estimated between $123 and $156 while parts are priced between $170 and $247. Estimate does not include taxes and fees.
Note about price: The cost of this service or repair can vary by location, your vehicle's make and model, and even your engine type. Related repairs may also be needed. Talk with a RepairPal Certified shop to learn which repairs might be right for you.

How does the Radiator Fan Clutch work?

In older models, the fan clutch is controlled completely by the temperature of the engine versus the engine speed. As the clutch heats up, friction builds, and this causes the fan to rotate closer to the speed of the engine. When the clutch cools, the engine fan slows down because of a reduction in friction. This can waver, however, as the engine speed may increase or decrease suddenly, and the state of the clutch will determine how fast or slow the fan will speed up or slow down. The goal is to prevent the fan from running unless it is needed, providing more of the engine's power for operation of the vehicle. Electronically controlled fans work in the same manner, but they are actuated by a control module instead of mechanical actuation.

What are the symptoms of a bad Radiator Fan Clutch?

The first indication of a defective fan clutch is a healthy cooling system that runs below or above the normal temperature range. This is due to the fan running too fast or too slow. Also, a seized cooling fan will cause a loud roaring fan noise from under the hood every time the accelerator is pressed, and the engine will feel as if it lacks power. In this situation it would be very difficult to turn the engine cooling fan by hand, of course when the vehicle is off. Finally, if the clutch fails the fan will either turn very slowly, and not respond well to engine speed.

Can I drive with a bad Radiator Fan Clutch?

Vehicles with a seized fan clutch can be operated indefinitely, however, the engine will lack power, fuel economy will greatly diminish, and the engine will run cooler than its optimal operating temperature. This can eventually cause other issues, like higher levels of carbon buildup or catalytic converter failure, but in general the vehicle will operate. A fan clutch that fails to engage should be replaced immediately, as this will result in the vehicle overheating when not in motion, or when at moderate to high engine loads.

How often does the Radiator Fan Clutch need replacement?

Median failure rates of fan a sample set of domestic and foreign vehicles shows fan clutch failure is most typical around 140,000 miles. This is no guarantee, but repair data has shown this is the most likely range for failure. Most vehicles which use fan clutches are older, and may not be in operation any longer, but those that are will likely have this component replaced at some point during its useful life.

How are Radiator Fan Clutches replaced?

Replacing the radiator fan clutch requires that the fan be disconnected from the fan clutch, and this means the fan will need to be locked or held in position to loosen all fasteners. Once the fasteners for the fan are removed, the fan clutch will either be removed with the fan drive shaft, or pulled from the drive shaft if it is not replaced as an assembly. For electronically actuated fan clutches, the fan clutch will be disconnected from the electrical connector as well, and the connector will be cleaned with electrical parts cleaner before reassembly. Assembly is the reverse order of disassembly, and the repair must be verified by warming the engine and checking the operation of the radiator cooling fan and clutch assembly.

RepairPal Recommendations for Radiator Fan Clutch issues

We recommend checking the operation of the coolant temperature sensor prior to replacing the fan clutch assembly. If the engine coolant temperature (ECT) sensor is faulty, it may be reading too low or too high, and the fan clutch may be operating properly according the actual temperature of the engine. This check could be done by comparing an infrared reading of the thermostat housing temperature, and comparing that temperature to the engine temperature gauge.

What to look out for when dealing with Radiator Fan Clutch issues

Never touch a fan while the engine is running. Especially if the fan clutch is permanently seized, the fan will be spinning at the same speed of the engine, with the full power of the engine behind it. This can easily cut or maim a hand or arm. Also, never wear loose clothing while leaning over the engine compartment. If loose clothing becomes trapped in the fan, the fan will pull the clothing and the wearer of that clothing into the fan.

Can I replace the Radiator Fan Clutch myself?

This is not a difficult repair or diagnosis, but for electronic fans a complete understanding of the fan circuit and controller is necessary to identify the cause of failure. If the clutch must be removed from the fan drive shaft, a specialty puller will need to be used, but this is normally not the case. Great precaution should be taken while working around the engine fan, and the battery should be disconnected to render the engine incapable of starting.