Are you trying to replace the engine fan, or the climate control blower motor fan?
Ok, here are directions to remove the fan:
Remove fan shroud:
After removing the shroud, you are ready to remove the fan. Depending on whether yours is early or late model, there are 2 different fan and fan clutch styles.
Late model style with large fan clutch nut( special fan clutch tools required-available at all parts stores):
Early model style:
Some vehicles use a spacer between the fan and the water pump pulley. If used, be sure to retain the spacer for installation.