That Big Nut has to be turned to take off your Fan/Clutch...You might need to
give it a good hit on
the wrench with a hammer
:I am trying to change the water pump on a 99 jimmy, I took off the bolts
: holding on the pulley thinking they were for the fan/clutch, but they
: werent. so how do I get the fan off? On the shaft there is what looks like a
: place were I could possibly put a 19mm wrench to turn it, but I'm not sure.