Quote Originally Posted by Sharpe View Post
You dont use a gear puller on the alternator pulley...

It has a conical wedge holding the serpentine pulley to the alterntor shaft. The shaft is not tapered but the hole in the pulley is. If you take the nut off and look at the shaft, you can see the ~1/8" thick end of the wedge with the split in it. You have to get a socket or piece of pipe big enough to go around the wedge but fit inside the face of the pulley. You then beat the piss out of the pulley and it will loosen the wedge free. Its best to put the alternator face up on a piece of wood with the back on the housing where the shaft is supported directly on the wood. This will somewhat absorb the impact of the hammer whacks and hopefully keep you from FUBARing anything on the case. Make sure the threaded post on the back of the case is not taking the brunt of the hits, its insulation WILL break. Then just getcha a normal v-belt pulley and bolt that ***** on there, it is just held in place by friction, no wedge involved.
Straight from the GM manual, right?