How do I remove the fan clutch on a 1998 GMC K1500?

The fan clutch is off of a 5.7 liter V8 Vortec motor. It is mounted to the water pump and pulley by one large nut.How do I remove the fan clutch on a 1998 GMC K1500?http://wiki.answers.com/Q/How_do_you_remHow do I remove the fan clutch on a 1998 GMC K1500?on removing that nut they make a special wrench for it. when you have the wrench an starting to take nut off it turns the opposite that you would normally take offHow do I remove the fan clutch on a 1998 GMC K1500?Auto Zone rents the tool you need.