How to Change a Silverado Cooling Fan Clutch
If you have problems with your Silverado overheating, you may have a problem with your fan or the fan clutch. This can be difficult to replace, so you may be tempted to take it to the dealer; however, with this guide and a little patience, you can do the repair at home.
- Ratchet and various size sockets
- Flat head screwdriver
- A large adjustable wrench
- A large hammer or heavy object
For safety reasons, your first step should be disconnecting the negative terminal from the battery. Now you can work on accessing the fan. You may need to remove some hoses that run from your air intake into the throttle body. Loosen the clips that hold them in place with the ratchet. If they get stuck on their housings, use the flat head screwdriver to help pry them free. Be careful not to damage the hoses.
Once the clips are loose, remove the hoses. With the hoses moved out of the way, remove the cowl that covers the fan. These are usually held on by two 10mm bolts and four plastic pins. Remove all of these and you should be able to lift the cowl out and see the fan.
Removing The Fan
If you're looking down at the fan, you'll see a nut holding the assembly onto the motor behind. Loosen this nut to remove the fan. The easiest way to do this is to attach your large adjustable wrench to this nut and strike it firmly counterclockwise with your hammer or other heavy object.
With one or two good strikes, the fan should be loose and you will be able to rotate it without the motor behind turning. If you have any difficulties removing it, spray it with some WD-40 and strike it again. Rotate the fan counterclockwise until it uncouples from its mounting.
Replacing The Fan Clutch
Once you have the fan assembly removed from the vehicle, you can replace the clutch from the fan itself. There will be four bolts holding it in place that you need to remove. Once these are removed, replace the fan clutch and rebuild the fan. Tighten the bolts on the fan assembly to between 20-25 ft-lbs of torque.
Thread the fan assembly back onto its housing and use the wrench to tighten it as much as possible by hand. Use your hammer for additional tightening, but don’t overdo it. One or two good taps will be enough.
Replace the cowl that covers the fan, replace the hoses that you removed, and you're done!